Methodology
FeeDeck is designed as an operator reference layer. Each calculator or guide starts from one seller pressure point, then makes the formula, assumptions, and next decision visible in plain language.
FeeDeck pages are not meant to be full accounting systems. Each page tries to answer one operator question clearly: what is left after marketplace fees, how much drag sits in the checkout stack, what landed cost does to the floor, or what ROAS the order can truly support.
Formula fields and defaults are built to keep the main fee layers explicit instead of hidden. When a platform has category variation, fixed fees, or optional layers, the inputs stay editable so the page does not pretend one number fits every store.
Key pages are reviewed manually for formula clarity, example quality, page status, and internal linking. When a page changes materially, the review note and guidance are updated together so the site does not present stale workflow advice as current.
FeeDeck is educational content, not tax, legal, or accounting advice. The pages are meant to help teams isolate the weak layer in the order, then validate live terms, rates, and obligations against their own channel contracts and advisors.