Sizu Home › Calculators › Boost Break-Even
Enter the boost fee and your contribution per sale (price − variable cost). Then press Calculate.
From the book — Bonus, Ch 9. Contribution per sale = price − variable cost. Extra sales needed = boost fee ÷ contribution (round up). The catch: only sales the boost caused count. If you'd have sold them anyway, the boost cost was pure fee.
Optimistic guesses about "extra sales caused" is where boost math usually breaks. Be honest.