Option A: 150.00 | Option B: 205.00 | Difference: 55.00 is the example result. Read it using the units and relationship stated below.
Cross Marketplace Net Profit uses sales volume, marketplace a fee (%), marketplace b fee (%).
Protecting contribution before accepting a price
For cross marketplace net profit, the relationship is Percentage-fee options: cost = gross sales × fee percentage ÷ 100 + other cost. Fulfillment options: cost = orders × fulfillment cost per order. Compare both totals on the same base. The amount depends on the supplied sales volume, marketplace a fee (%), 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.
What the model includes
Percentage-fee options: cost = gross sales × fee percentage ÷ 100 + other cost. Fulfillment options: cost = orders × fulfillment cost per order. Compare both totals on the same base. A pricing review should retain the supplier cost, sale price and the reason for any allowance. Returns, payment charges, delivery and tax require explicit treatment; they should not disappear inside a percentage labelled profit. Compare the proposed price with the customer agreement and delivery capacity. A mathematically achievable margin does not establish that buyers will accept the offer.
Example with the supplied inputs
Sales volume: 1000; Marketplace A fee (%): 10; Marketplace B fee (%): 13; Other cost A: 50; Other cost B: 75. Result: Option A: 150.00 | Option B: 205.00 | Difference: 55.00. The values are illustrative.
Compare one changed input
Sales volume changes from 1000 to 1100. The result becomes Option A: 160.00 | Option B: 218.00 | Difference: 58.00. All other inputs remain fixed.
Calculation rule
Percentage-fee options: cost = gross sales × fee percentage ÷ 100 + other cost. Fulfillment options: cost = orders × fulfillment cost per order. Compare both totals on the same base.
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Sales volume | 1000 | Measure sales volume in the displayed unit. Convert the source measurement before entry if it uses another system; a changed label does not perform a unit conversion. |
| Marketplace A fee (%) | 10 | Enter marketplace a fee (%) on the percentage scale used in the formula (20 means 20%, not 0.20). Keep its base and reporting period consistent with the other inputs. |
| Marketplace B fee (%) | 13 | Enter marketplace b fee (%) on the percentage scale used in the formula (20 means 20%, not 0.20). Keep its base and reporting period consistent with the other inputs. |
| Other cost A | 50 | Use other cost a 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. |
| Other cost B | 75 | Use other cost b 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: Option A: 150.00 | Option B: 205.00 | Difference: 55.00 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 Sales volume, Marketplace A fee (%), Marketplace B fee (%). 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 Sales volume 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 Option A: 150.00 | Option B: 205.00 | Difference: 55.00.
Change Sales volume from 1000 to 1100 while keeping every other value fixed. The result becomes Option A: 160.00 | Option B: 218.00 | Difference: 58.00. 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