Short, honest explainers of the math that decides whether a product makes money — no fluff, no fake screenshots, just the mechanics and how to act on them.
Referral fees and the $0.30 minimum, fulfillment fees by size tier, dimensional weight, and storage — how each one works and where it quietly kills margin.
6 min readThe full deduction chain from a sale to your bank — fees, COGS, PPC and refunds — and why you must track net profit per SKU, not per account.
6 min readThe one PPC number that decides whether an ad makes or loses money — plus what ACoS, target ACoS and TACoS mean and how to bid around them.
5 min readThe true cost of a stockout, why overstock is a silent tax, and how to compute a reorder point and safety stock from real velocity and lead time.
6 min readDiscovery, reverse-ASIN and gap analysis — how Amazon search works and how to pick relevant, winnable terms instead of chasing raw search volume.
6 min readYour size tier sets your fulfillment fee, and it's decided by a few inches and ounces. How the tiers work and how trimming packaging pays back on every unit.
5 min readThe FBA reimbursement case types you can claim, why the filing window is the whole game, and how to find and recover what Amazon's mistakes cost you.
5 min readWhy international isn't just translation — how VAT reshapes tax-inclusive pricing, why FX and export costs matter, and how to compare marketplaces on real net profit.
6 min readMore guides on profit, PPC and inventory are on the way.