Does this give me a different answer than a generic fee calculator?
A generic calculator subtracts Stripe's percentage and fixed fee and stops there. Template sales rarely stop there. A launch coupon, a refund or two, and the fixed fee weighing heavier on a low ticket all change the per-sale number. The preset above sets those variables to a typical template scenario so the take-home figure reflects what a real $49 sale looks like, not a clean spreadsheet one.