The formula shown as a sentence with coloured terms; each term can be switched off or given a coefficient; promotion as largest or sum; a constant, floor, cap and rounding. A sample order line is computed by the server for the formula in force and the draft side by side, changes highlighted. Saving needs a change, a confirmed sample and a final confirm; the approved sample is kept and shown as the formula's reference, with earlier versions below. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>