fix fallback base on show product

src/utils/productPrice.ts

@@ -1,6 +1,7 @@
 import type { Product } from '@/models/products'
 import { getTradeBuyPrice, getTradeSellPrice, lastPrice } from '@/utils/price'
-import { isMetalCommodityGroup, isMeltedProductUsingAppPrice, isMeltedTradeGroup } from '@/utils/productCategories'
+import { isMetalCommodityGroup, isMeltedProductUsingAppPrice, isMeltedTradeGroup, usesQuantityTrade } from '@/utils/productCategories'
+import { productPriceAmountFactor } from '@/utils/productDealMethod'
 
 function productUsesLastPriceIfZero(product: Product): boolean {
   return Boolean(product.use_last_price_if_zero)
@@ -89,13 +90,14 @@ export function getProductBuyPrice(product: Product): number {
     isMeltedProductUsingAppPrice(product)
     || isMeltedTradeGroup(product.group_type)
     || isMetalCommodityGroup(product.group_type)
+    || usesQuantityTrade(product)
   ) {
     return base + fee
   }
 
   const withFee = base + fee
   return product.direct_price === 0
-    ? withFee * Number(product.amount ?? 0)
+    ? withFee * productPriceAmountFactor(product)
     : withFee
 }
 
@@ -138,7 +140,7 @@ export function getProductSellPrice(product: Product): number {
     return 0
   }
 
-  if (isMeltedProductUsingAppPrice(product) || isMeltedTradeGroup(product.group_type)) {
+  if (isMeltedProductUsingAppPrice(product) || isMeltedTradeGroup(product.group_type) || usesQuantityTrade(product)) {
     return base - Number(product.cash_fee_sell ?? 0)
   }