Principles & Formula
Profit-first, market-aware. Start from contribution margin and let demand tell you how far you can go. Track unit volume and contribution per vend; keep any price that grows total contribution even if units dip slightly.
Price (pre-tax) = ( COGS × (1 + Shrink%) + PerTxnFee ) ÷ ( 1 − TargetMargin − Commission% − Card% )
- Model reality: include card % + per-txn, commission, and expected shrink.
- Adjust assortment (good/better/best) to meet different budgets without racing to the bottom.
- Test in small steps (±$0.05–$0.25) and watch contribution per visit, not just units.