16.67% is the example result. Read it using the units and relationship stated below.
FBA TACOS uses ad spend, total revenue.
Protecting contribution before accepting a price
For fba tacos, the relationship is Result = (([Ad spend]) ÷ ([Total revenue])) × 100. The amount depends on the supplied ad spend, total revenue, rather than a live market price or a value imported from another record. A quote can meet a revenue target and still leave too little to cover delivery. Separate the selling-price denominator from the cost denominator: margin and markup answer different questions. A discount changes contribution even when the supplier cost stays fixed.
Source and result record
For fba tacos, retain Ad spend, Total revenue together with the output. Record the date of the source values and the unit convention used in the form. That record separates a change in the underlying case from a change in how the information was entered. A saved result without its source values cannot show which assumption produced it.
Example with the supplied inputs
Ad spend: 1000; Total revenue: 6000. Result: 16.67%. The values are illustrative.
Compare one changed input
Ad spend changes from 1000 to 1100. The result becomes 18.33%. All other inputs remain fixed.
Calculation rule
Result = (([Ad spend]) ÷ ([Total revenue])) × 100
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Ad spend | 1000 | Use ad spend on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
| Total revenue | 6000 | Use total revenue on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
Output: 16.67% is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Ad spend, Total revenue. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Ad spend on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 16.67%.
Change Ad spend from 1000 to 1100 while keeping every other value fixed. The result becomes 18.33%. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026