List the complete cost
Include advertising, tools, fees, discounts, refunds and fulfillment. Use the amount connected to the exact test.
Find contribution per sale
Subtract variable costs and fees from the sale price. That remainder—not gross revenue—helps cover campaign cost.
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Calculate and limit
Divide campaign cost by contribution per sale, then set a spending limit before the campaign begins.
Frequently asked questions
What is break-even?
It is the point where revenue contribution covers the measured campaign cost.
Should free advertising be counted as zero cost?
Not always. Include paid upgrades and consider the time required to earn and place credits.
A responsible next step
Use this guide to identify one action you can complete and document. Avoid changing everything at once. A small test with clear records usually teaches more than a large campaign built on assumptions.