diff --git a/app/Http/Controllers/Admin/ProductController.php b/app/Http/Controllers/Admin/ProductController.php
index f0aae1c..14ad250 100644
--- a/app/Http/Controllers/Admin/ProductController.php
+++ b/app/Http/Controllers/Admin/ProductController.php
@@ -15,11 +15,13 @@ use Illuminate\Support\Facades\Http;
 use \App\Http\Controllers\Customer\FundController;
 use App\Http\Controllers\Site\ReportController;
 use App\Services\ConfigService;
+use App\Services\FormulaPriceService;
 use App\Services\ProductDisplayPriceService;
 use App\Services\ProductPriceService;
 use App\Services\ProductPriceSyncService;
 use App\Services\PriceBroadcastService;
 use App\Services\CategoryService;
+use App\Services\ZaarboxPriceService;
 use Illuminate\Support\Facades\Schema;
 
 
@@ -117,6 +119,11 @@ class ProductController extends SuperController
         $data = $this->filterProductData($request->all());
 
         $product = Product::create($data);
+
+        if (FormulaPriceService::isEnabled($product) && $product->reading_method) {
+            app(ZaarboxPriceService::class)->syncProductFromApi($product);
+        }
+
         $this->broadcastPricesAfterResponse(true);
 
         return $this->resultCreate($product->id);
@@ -134,7 +141,10 @@ class ProductController extends SuperController
         }
         // قیمت دستی ⇒ تعدیل مرجع بی‌معناست و صفر می‌شود.
         // قیمت اپ در filterProductData عمداً price=0 می‌گذارد؛ نباید تعدیل را پاک کند.
-        if (isset($data['price']) && empty($data['app_price'])) {
+        // قیمت فرمولی reading_method می‌خواهد — با وجود price ذخیره‌شده مرجع را پاک نکن.
+        $formulaEnabled = Product::hasPriceFormulaColumns()
+            && filter_var($data['price_formula_enabled'] ?? false, FILTER_VALIDATE_BOOLEAN);
+        if (isset($data['price']) && empty($data['app_price']) && ! $formulaEnabled) {
             $data['reading_method'] = null;
             if (Product::hasPriceOffsetColumn()) {
                 $data['price_offset_percent'] = 0;
@@ -166,6 +176,7 @@ class ProductController extends SuperController
             && $product->reading_method
             && array_key_exists('price_offset_percent', $data)
             && !$clearingReadingMethod
+            && ! $formulaEnabled
         ) {
             ProductPriceService::reapplyOffsetPercent(
                 $product,
@@ -176,6 +187,12 @@ class ProductController extends SuperController
         }
 
         $product->update($data);
+        $product->refresh();
+
+        if (FormulaPriceService::isEnabled($product) && $product->reading_method) {
+            app(ZaarboxPriceService::class)->syncProductFromApi($product);
+        }
+
         $this->broadcastPricesAfterResponse(true);
 
         return response()->json(true);
@@ -659,6 +676,35 @@ class ProductController extends SuperController
                 }
                 $data['price'] = 0;
                 $data['price_profit'] = 0;
+                if (Product::hasPriceFormulaColumns()) {
+                    $data['price_formula_enabled'] = false;
+                }
+            }
+        }
+
+        if (!Product::hasPriceFormulaColumns()) {
+            unset($data['price_formula_enabled'], $data['price_formula']);
+        } else {
+            $formulaEnabled = filter_var($data['price_formula_enabled'] ?? false, FILTER_VALIDATE_BOOLEAN);
+            $data['price_formula_enabled'] = $formulaEnabled;
+            $formula = trim((string) ($data['price_formula'] ?? ''));
+            if ($formulaEnabled) {
+                if ($formula === '') {
+                    $formula = FormulaPriceService::DEFAULT_FORMULA;
+                }
+                $data['price_formula'] = $formula;
+                $data['app_price'] = false;
+                if (Product::hasDirectPriceColumn()) {
+                    $data['direct_price'] = 1;
+                }
+                if (Product::hasPriceOffsetColumn()) {
+                    $data['price_offset_percent'] = 0;
+                }
+                if (empty($data['reading_method'])) {
+                    throw new UnprocessableEntityHttpException('برای قیمت فرمولی، یک مرجع قیمت انتخاب کنید');
+                }
+            } else {
+                $data['price_formula'] = $formula !== '' ? $formula : null;
             }
         }
 
diff --git a/app/Http/Controllers/Controller.php b/app/Http/Controllers/Controller.php
index 3c948f6..5dd8cdd 100644
--- a/app/Http/Controllers/Controller.php
+++ b/app/Http/Controllers/Controller.php
@@ -773,8 +773,14 @@ class Controller extends BaseController
             'direct_price' => is_object($product) ? ($product->direct_price ?? null) : null,
             'group_type' => is_object($product) ? ($product->group_type ?? null) : null,
             'reading_method' => is_object($product) ? ($product->reading_method ?? null) : null,
+            'price_formula_enabled' => is_object($product) ? ($product->price_formula_enabled ?? null) : null,
         ];
 
+        // قیمت فرمولی = قیمت واحد هر عدد (وزن داخل فرمول است)
+        if (! empty($payload['price_formula_enabled'])) {
+            return 1.0;
+        }
+
         if (! empty($payload['reading_method'])) {
             return 1.0;
         }
diff --git a/app/Http/Controllers/Single/SingleOrderController.php b/app/Http/Controllers/Single/SingleOrderController.php
index 26f8574..8656128 100644
--- a/app/Http/Controllers/Single/SingleOrderController.php
+++ b/app/Http/Controllers/Single/SingleOrderController.php
@@ -27,6 +27,7 @@ use App\Services\MontzarService;
 use App\Services\ConfigService;
 use App\Services\ProductPriceService;
 use App\Services\ProductDisplayPriceService;
+use App\Services\FormulaPriceService;
 use App\Services\ReferralGiftService;
 use App\Services\WalletBroadcastService;
 
@@ -127,7 +128,8 @@ class SingleOrderController extends Controller
                 $data['price_original'] = $this->resolveProductUnitBasePrice($data['product']);
                 $this->applyCashPriceDiff($config, $data['product'], 1, $data, (float) $data['price_original']);
                 $data['total_fee'] = $data['number'] * $data['fee'];
-                $data['total_price_original'] = $data['product']['amount'] * ($data['price_original'] ?? 0);
+                $data['total_price_original'] = $this->resolveProductOrderPricingAmount($data['product'], 1.0)
+                    * ($data['price_original'] ?? 0);
 
                 // Check if the method is cash
                 if ($data['method'] == "cash") {
@@ -147,7 +149,8 @@ class SingleOrderController extends Controller
                 $data['price_original'] = $this->resolveProductUnitBasePrice($data['product']);
                 $this->applyCashPriceDiff($config, $data['product'], 2, $data, (float) $data['price_original']);
                 $data['total_fee'] = $data['number'] * $data['fee'];
-                $data['total_price_original'] = $data['product']['amount'] * ($data['price_original'] ?? 0);
+                $data['total_price_original'] = $this->resolveProductOrderPricingAmount($data['product'], 1.0)
+                    * ($data['price_original'] ?? 0);
 
                 $this->assertMinimumSellCash($data);
 
@@ -394,7 +397,7 @@ class SingleOrderController extends Controller
     {
         // همان قیمت پایهٔ سفارش (price_original / قیمت اپ) — نه ستون کهنهٔ products.price
         $data['price'] = $this->resolveProductOrderUnitPrice($data) + (float) ($data['difference'] ?? 0);
-        $data['amount'] = $data['number'] * $data['product']['amount'];
+        $data['amount'] = $this->resolveProductOrderPricingAmount($data['product'], (float) $data['number']);
         // محصول تعدادی: کارمزد فقط از ریال (fee_service_charge_percentage)
         $feeRate = isset($data['fee_free']) && $data['fee_free'] === true
             ? 0.0
@@ -452,7 +455,7 @@ class SingleOrderController extends Controller
     {
 
         $data['price'] += $data['difference'];
-        $data['amount'] = $data['number'] * $data['product']['amount'];
+        $data['amount'] = $this->resolveProductOrderPricingAmount($data['product'], (float) $data['number']);
         // محصول تعدادی: کارمزد از ریال (fee_service_charge_percentage)
         $feeRate = isset($data['fee_free']) && $data['fee_free'] === true
             ? 0.0
@@ -670,7 +673,7 @@ class SingleOrderController extends Controller
     {
         // همان قیمت پایهٔ سفارش (price_original / قیمت اپ) — نه ستون کهنهٔ products.price
         $data['price'] = max(0.0, $this->resolveProductOrderUnitPrice($data) - (float) ($data['difference'] ?? 0));
-        $data['amount'] = $data['number'] * $data['product']['amount'];
+        $data['amount'] = $this->resolveProductOrderPricingAmount($data['product'], (float) $data['number']);
         // محصول تعدادی: کارمزد فقط از ریال
         $feeRate = isset($data['fee_free']) && $data['fee_free'] === true
             ? 0.0
@@ -723,7 +726,7 @@ class SingleOrderController extends Controller
     private function processSellTransactionProductByGold(&$data, $wallet, $wallet_interface)
     {
         $data['price'] -= $data['difference'];
-        $data['amount'] = $data['number'] * $data['product']['amount'];
+        $data['amount'] = $this->resolveProductOrderPricingAmount($data['product'], (float) $data['number']);
         // محصول تعدادی: کارمزد فقط از ریال
         $feeRate = isset($data['fee_free']) && $data['fee_free'] === true
             ? 0.0
@@ -1100,7 +1103,7 @@ class SingleOrderController extends Controller
         if (!empty($data['product_id']) && isset($data['number'])) {
             $product = $data['product'] ?? Product::find($data['product_id']);
             if ($product) {
-                return (float) $data['number'] * (float) $product->amount;
+                return $this->resolveProductOrderPricingAmount($product, (float) $data['number']);
             }
         }
 
@@ -1161,7 +1164,7 @@ class SingleOrderController extends Controller
             $product = $data['product'] ?? Product::find($data['product_id']);
             if ($product) {
                 $difference = (float) ($data['difference'] ?? 0);
-                $amount = (float) $data['number'] * (float) $product->amount;
+                $amount = $this->resolveProductOrderPricingAmount($product, (float) $data['number']);
                 $sellUnitPrice = max(0.0, $this->resolveProductOrderUnitPrice($data) - $difference);
 
                 return $amount * $sellUnitPrice;
diff --git a/app/Models/Product.php b/app/Models/Product.php
index db5c5b2..3f1b3d3 100644
--- a/app/Models/Product.php
+++ b/app/Models/Product.php
@@ -28,6 +28,7 @@ class Product extends Model
     private static ?bool $cashFeePercentModeColumnsExist = null;
     private static ?bool $physicalDeliveryColumnsExist = null;
     private static ?bool $descriptionColumnExists = null;
+    private static ?bool $priceFormulaColumnsExist = null;
 
     protected static function booted(): void
     {
@@ -78,9 +79,32 @@ class Product extends Model
                     $product->attributes['min_physical_delivery_quantity']
                 );
             }
+            if (!static::hasPriceFormulaColumns()) {
+                unset(
+                    $product->attributes['price_formula_enabled'],
+                    $product->attributes['price_formula']
+                );
+            }
         });
     }
 
+    public static function hasPriceFormulaColumns(): bool
+    {
+        if (static::$priceFormulaColumnsExist !== null) {
+            return static::$priceFormulaColumnsExist;
+        }
+
+        try {
+            $table = (new static)->getTable();
+            static::$priceFormulaColumnsExist = Schema::hasColumn($table, 'price_formula_enabled')
+                && Schema::hasColumn($table, 'price_formula');
+        } catch (\Throwable) {
+            static::$priceFormulaColumnsExist = false;
+        }
+
+        return static::$priceFormulaColumnsExist;
+    }
+
     public static function hasPhysicalDeliveryColumns(): bool
     {
         if (static::$physicalDeliveryColumnsExist !== null) {
@@ -418,6 +442,8 @@ class Product extends Model
         'description',
         'direct_price',
         'app_price',            // روشن: قیمت واحد از قیمت زندهٔ اپ هر گرم × وزن محاسبه می‌شود
+        'price_formula_enabled',
+        'price_formula',
     ];
 
     protected $attributes = [
@@ -427,6 +453,7 @@ class Product extends Model
         'cash_fee_buy_is_percent' => false,
         'cash_fee_sell_is_percent' => false,
         'app_price' => false,
+        'price_formula_enabled' => false,
     ];
 
     protected $casts = [
@@ -457,6 +484,7 @@ class Product extends Model
         'price_offset_percent' => 'float',
         'price_profit' => 'int',
         'app_price' => 'boolean',
+        'price_formula_enabled' => 'boolean',
     ];
 
     static $METAL_ID = [
diff --git a/app/Services/FormulaPriceService.php b/app/Services/FormulaPriceService.php
new file mode 100644
index 0000000..96cdc18
--- /dev/null
+++ b/app/Services/FormulaPriceService.php
@@ -0,0 +1,281 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Product;
+use InvalidArgumentException;
+
+class FormulaPriceService
+{
+    /** ضریب تبدیل مثقال به گرم — قابل استفاده در فرمول با MG */
+    public const MG = 4.331802;
+
+    public const DEFAULT_FORMULA = '((P)/MG)*W+100000';
+
+    public static function isEnabled(?Product $product): bool
+    {
+        if (! Product::hasPriceFormulaColumns()) {
+            return false;
+        }
+
+        return (bool) ($product?->price_formula_enabled);
+    }
+
+    /**
+     * P = قیمت وسط مرجع (بدون تفاوت ارائه‌دهنده / بدون price_offset_percent)
+     *
+     * @param  array<string, mixed>|null  $mazanehRow
+     */
+    public static function calculateForProduct(Product $product, ?array $mazanehRow): ?int
+    {
+        if (! self::isEnabled($product) || $mazanehRow === null) {
+            return null;
+        }
+
+        if (array_key_exists('active', $mazanehRow) && $mazanehRow['active'] == false) {
+            return null;
+        }
+
+        $p = (float) ($mazanehRow['price'] ?? 0);
+        if ($p <= 0) {
+            return null;
+        }
+
+        $formula = trim((string) ($product->price_formula ?? ''));
+        if ($formula === '') {
+            $formula = self::DEFAULT_FORMULA;
+        }
+
+        return self::evaluate($formula, $p, self::resolveWeight($product->amount ?? 0));
+    }
+
+    public static function resolveWeight(float $amount): float
+    {
+        return $amount == 0.0 ? 1.0 : (float) $amount;
+    }
+
+    public static function evaluate(string $formula, float $p, float $w): ?int
+    {
+        $formula = trim($formula);
+        if ($formula === '') {
+            return null;
+        }
+
+        try {
+            $result = self::evaluateExpression($formula, [
+                'P' => $p,
+                'W' => $w,
+                'MG' => self::MG,
+            ]);
+        } catch (InvalidArgumentException $e) {
+            return null;
+        }
+
+        if (! is_finite($result)) {
+            return null;
+        }
+
+        return (int) round($result);
+    }
+
+    /**
+     * @param  array<string, float>  $variables
+     */
+    private static function evaluateExpression(string $expression, array $variables): float
+    {
+        $tokens = self::tokenize($expression);
+        $position = 0;
+        $result = self::parseExpression($tokens, $position, $variables);
+
+        if ($position < count($tokens)) {
+            throw new InvalidArgumentException('Invalid formula syntax');
+        }
+
+        return $result;
+    }
+
+    /**
+     * @return array<int, array{type: string, value: string}>
+     */
+    private static function tokenize(string $expression): array
+    {
+        $expression = str_replace(['×', '÷'], ['*', '/'], $expression);
+        $expression = preg_replace('/\s+/', '', $expression) ?? '';
+
+        if ($expression === '' || ! preg_match('/^[0-9A-Za-z_.,+\-*\/()]+$/', $expression)) {
+            throw new InvalidArgumentException('Invalid formula characters');
+        }
+
+        preg_match_all('/([0-9]+(?:\.[0-9]+)?|[A-Za-z_][A-Za-z0-9_]*|[+\-*\/(),])/', $expression, $matches);
+
+        if (($matches[0] ?? []) === [] || implode('', $matches[0]) !== $expression) {
+            throw new InvalidArgumentException('Invalid formula syntax');
+        }
+
+        $tokens = [];
+        foreach ($matches[0] as $part) {
+            if (preg_match('/^[0-9]/', $part)) {
+                $tokens[] = ['type' => 'number', 'value' => $part];
+            } elseif (preg_match('/^[A-Za-z_]/', $part)) {
+                $tokens[] = ['type' => 'ident', 'value' => strtoupper($part)];
+            } else {
+                $tokens[] = ['type' => 'op', 'value' => $part];
+            }
+        }
+
+        return $tokens;
+    }
+
+    /**
+     * @param  array<int, array{type: string, value: string}>  $tokens
+     * @param  array<string, float>  $variables
+     */
+    private static function parseExpression(array $tokens, int &$position, array $variables): float
+    {
+        $value = self::parseTerm($tokens, $position, $variables);
+
+        while ($position < count($tokens) && in_array($tokens[$position]['value'], ['+', '-'], true)) {
+            $operator = $tokens[$position]['value'];
+            $position++;
+            $right = self::parseTerm($tokens, $position, $variables);
+            $value = $operator === '+' ? $value + $right : $value - $right;
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param  array<int, array{type: string, value: string}>  $tokens
+     * @param  array<string, float>  $variables
+     */
+    private static function parseTerm(array $tokens, int &$position, array $variables): float
+    {
+        $value = self::parseFactor($tokens, $position, $variables);
+
+        while ($position < count($tokens) && in_array($tokens[$position]['value'], ['*', '/'], true)) {
+            $operator = $tokens[$position]['value'];
+            $position++;
+            $right = self::parseFactor($tokens, $position, $variables);
+            if ($operator === '/') {
+                if (abs($right) < 1e-12) {
+                    throw new InvalidArgumentException('Division by zero');
+                }
+                $value /= $right;
+            } else {
+                $value *= $right;
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param  array<int, array{type: string, value: string}>  $tokens
+     * @param  array<string, float>  $variables
+     */
+    private static function parseFactor(array $tokens, int &$position, array $variables): float
+    {
+        if ($position >= count($tokens)) {
+            throw new InvalidArgumentException('Unexpected end of formula');
+        }
+
+        $token = $tokens[$position];
+
+        if ($token['type'] === 'number') {
+            $position++;
+
+            return (float) $token['value'];
+        }
+
+        if ($token['type'] === 'ident') {
+            $position++;
+            $name = $token['value'];
+
+            if ($position < count($tokens) && $tokens[$position]['value'] === '(') {
+                $position++;
+                $args = [];
+
+                if ($position >= count($tokens) || $tokens[$position]['value'] !== ')') {
+                    $args[] = self::parseExpression($tokens, $position, $variables);
+
+                    while ($position < count($tokens) && $tokens[$position]['value'] === ',') {
+                        $position++;
+                        $args[] = self::parseExpression($tokens, $position, $variables);
+                    }
+                }
+
+                if ($position >= count($tokens) || $tokens[$position]['value'] !== ')') {
+                    throw new InvalidArgumentException('Missing closing parenthesis');
+                }
+                $position++;
+
+                return self::applyFunction($name, $args);
+            }
+
+            if (! array_key_exists($name, $variables)) {
+                throw new InvalidArgumentException("Unknown variable: {$name}");
+            }
+
+            return (float) $variables[$name];
+        }
+
+        if ($token['value'] === '(') {
+            $position++;
+            $value = self::parseExpression($tokens, $position, $variables);
+            if ($position >= count($tokens) || $tokens[$position]['value'] !== ')') {
+                throw new InvalidArgumentException('Missing closing parenthesis');
+            }
+            $position++;
+
+            return $value;
+        }
+
+        if ($token['value'] === '-') {
+            $position++;
+
+            return -self::parseFactor($tokens, $position, $variables);
+        }
+
+        if ($token['value'] === '+') {
+            $position++;
+
+            return self::parseFactor($tokens, $position, $variables);
+        }
+
+        throw new InvalidArgumentException('Invalid formula syntax');
+    }
+
+    /**
+     * @param  list<float>  $args
+     */
+    private static function applyFunction(string $name, array $args): float
+    {
+        if ($args === []) {
+            throw new InvalidArgumentException("Invalid arguments for {$name}");
+        }
+
+        $value = (float) $args[0];
+        $precision = isset($args[1]) ? (int) $args[1] : 0;
+
+        return match ($name) {
+            'ROUND' => (float) round($value, $precision),
+            'FLOOR' => self::floorPrecision($value, $precision),
+            'CEIL', 'CEILING' => self::ceilPrecision($value, $precision),
+            default => throw new InvalidArgumentException("Unknown function: {$name}"),
+        };
+    }
+
+    private static function floorPrecision(float $value, int $precision): float
+    {
+        $factor = 10 ** $precision;
+
+        return floor($value * $factor) / $factor;
+    }
+
+    private static function ceilPrecision(float $value, int $precision): float
+    {
+        $factor = 10 ** $precision;
+
+        return ceil($value * $factor) / $factor;
+    }
+}
diff --git a/app/Services/ProductDisplayPriceService.php b/app/Services/ProductDisplayPriceService.php
index 7820485..54b5469 100644
--- a/app/Services/ProductDisplayPriceService.php
+++ b/app/Services/ProductDisplayPriceService.php
@@ -95,6 +95,11 @@ class ProductDisplayPriceService
                 continue;
             }
 
+            if (FormulaPriceService::isEnabled($product) && $product->reading_method && is_array($zaarboxFeed)) {
+                $this->applyFormulaFeedPrice($product, $zaarboxFeed, $zaarbox);
+                continue;
+            }
+
             if ($this->usesAppPrice($product)) {
                 $base = $this->productUsesLastPriceIfZero($product)
                     ? $this->resolveAppBasePrice()
@@ -308,6 +313,45 @@ class ProductDisplayPriceService
         return $this->extractBaseFromPayload($cached);
     }
 
+    /** @param array<int, array<string, mixed>> $feed */
+    private function applyFormulaFeedPrice(Product $product, array $feed, ZaarboxPriceService $zaarbox): void
+    {
+        $useLast = $this->productUsesLastPriceIfZero($product);
+        $row = $zaarbox->findFeedRow($feed, (string) $product->reading_method);
+        if ($row === null) {
+            $product->setAttribute('reference_provider_active', $useLast);
+            $this->applyPriceOrFallback($product, 0, $useLast);
+
+            return;
+        }
+
+        $parts = $zaarbox->resolveReferenceBaseProfit($row);
+        $providerActive = $useLast || $parts['price'] > 0;
+        $product->setAttribute('reference_provider_active', $providerActive);
+
+        if (! $useLast && $parts['price'] <= 0) {
+            $this->zeroProductPrice($product);
+
+            return;
+        }
+
+        $computed = FormulaPriceService::calculateForProduct($product, [
+            'price' => $parts['price'],
+            'active' => true,
+        ]);
+
+        if ($computed === null || $computed <= 0) {
+            $this->applyPriceOrFallback($product, 0, $useLast);
+
+            return;
+        }
+
+        $product->setAttribute('price', $computed);
+        if (Schema::hasColumn($product->getTable(), 'price_profit')) {
+            $product->setAttribute('price_profit', 0);
+        }
+    }
+
     /** @param array<int, array<string, mixed>> $feed */
     private function applyReferenceFeedPrice(Product $product, array $feed, ZaarboxPriceService $zaarbox): void
     {
@@ -410,6 +454,10 @@ class ProductDisplayPriceService
                 }
             }
 
+            if (FormulaPriceService::isEnabled($product)) {
+                return (int) (($product->price ?? 0) + ($product->price_profit ?? 0));
+            }
+
             if ((int) ($product->direct_price ?? 0) === 1) {
                 return (int) (($product->price ?? 0) + ($product->price_profit ?? 0));
             }
diff --git a/app/Services/ProductPriceService.php b/app/Services/ProductPriceService.php
index 9ca5026..bae7028 100644
--- a/app/Services/ProductPriceService.php
+++ b/app/Services/ProductPriceService.php
@@ -78,6 +78,45 @@ class ProductPriceService
             return null;
         }
 
+        if (FormulaPriceService::isEnabled($product)) {
+            $computed = FormulaPriceService::calculateForProduct($product, [
+                'price' => $basePrice,
+                'active' => true,
+            ]);
+
+            if ($computed === null || $computed <= 0) {
+                if (
+                    Product::hasUseLastPriceIfZeroColumn()
+                    && ($product->use_last_price_if_zero ?? false)
+                ) {
+                    return null;
+                }
+
+                $computed = 0;
+            }
+
+            $oldPrice = (int) ($product->price ?? 0);
+            $data = ['price' => $computed];
+            if (\Illuminate\Support\Facades\Schema::hasColumn($product->getTable(), 'price_profit')) {
+                $data['price_profit'] = 0;
+            }
+            Product::where('id', $product->id)->update($data);
+
+            return [
+                'product_id' => $product->id,
+                'product_title' => $product->title,
+                'reading_method' => $product->reading_method,
+                'source_name' => $sourceName ?? $product->reading_method,
+                'base_price' => $basePrice,
+                'base_profit' => $baseProfit,
+                'offset_percent' => 0.0,
+                'old_price' => $oldPrice,
+                'new_price' => $computed,
+                'changed' => $oldPrice !== $computed,
+                'price_formula' => true,
+            ];
+        }
+
         $offsetPercent = self::offsetPercent($product);
         $adjustedPrice = self::adjustedTotal($basePrice, $baseProfit, $offsetPercent);
         $oldPrice = (int) ($product->price ?? 0);
diff --git a/app/Services/ZaarboxPriceService.php b/app/Services/ZaarboxPriceService.php
index 3e18912..3367d80 100644
--- a/app/Services/ZaarboxPriceService.php
+++ b/app/Services/ZaarboxPriceService.php
@@ -739,6 +739,13 @@ class ZaarboxPriceService
             return 0;
         }
 
+        if (FormulaPriceService::isEnabled($product)) {
+            return FormulaPriceService::calculateForProduct($product, [
+                'price' => $parts['price'],
+                'active' => true,
+            ]) ?? 0;
+        }
+
         return ProductPriceService::adjustedTotal(
             $parts['price'],
             $parts['profit'],
diff --git a/database/migrations/2026_08_10_000001_add_price_formula_fields_to_products_table.php b/database/migrations/2026_08_10_000001_add_price_formula_fields_to_products_table.php
new file mode 100644
index 0000000..88053c5
--- /dev/null
+++ b/database/migrations/2026_08_10_000001_add_price_formula_fields_to_products_table.php
@@ -0,0 +1,48 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        if (! Schema::hasTable('products')) {
+            return;
+        }
+
+        Schema::table('products', function (Blueprint $table) {
+            if (! Schema::hasColumn('products', 'price_formula_enabled')) {
+                if (Schema::hasColumn('products', 'app_price')) {
+                    $table->boolean('price_formula_enabled')->default(false)->after('app_price');
+                } else {
+                    $table->boolean('price_formula_enabled')->default(false);
+                }
+            }
+            if (! Schema::hasColumn('products', 'price_formula')) {
+                $table->text('price_formula')->nullable()->after('price_formula_enabled');
+            }
+        });
+    }
+
+    public function down(): void
+    {
+        if (! Schema::hasTable('products')) {
+            return;
+        }
+
+        Schema::table('products', function (Blueprint $table) {
+            $drop = [];
+            if (Schema::hasColumn('products', 'price_formula_enabled')) {
+                $drop[] = 'price_formula_enabled';
+            }
+            if (Schema::hasColumn('products', 'price_formula')) {
+                $drop[] = 'price_formula';
+            }
+            if ($drop !== []) {
+                $table->dropColumn($drop);
+            }
+        });
+    }
+};