You sell a product for one price, but not everything above the product's cost turns into profit. The fee on a card, debit, or bank transfer payment also cuts into what the order actually leaves you.
This skill checks one order at a time. You give the sale price, what you paid for the product, and the payment method. You then get a short breakdown of the profit before the fee, the amount the payment method charged, and what was left after both.
The result comes first. If the order didn't turn a profit, or ended in a loss, the answer says so directly before showing the math.
Packaging, delivery, shipping, discounts, and freebies don't enter the calculation. If you mention any of those, the answer notes that they still need to be subtracted and that the real result will be lower.