Find how many sales a month — and how much revenue — it takes to cover your fixed costs.
Contribution per sale = Price − Variable cost per sale Break-even sales/mo = Fixed costs ÷ Contribution per sale Break-even revenue/mo = Break-even sales × Price
Every sale above your break-even point is profit; every sale below it is funded by your runway. Two levers move break-even: raise price (or contribution margin), or cut fixed costs. If a sale's variable cost is higher than its price, no volume will get you there — fix unit economics first.