Part 2: Understanding the Numbers
Part 2 follows the money on every sale, so you can trust a profit figure before you spend a cent.
| Chapter | What it covers |
|---|---|
| 5.1 The fees on every sale | Referral fees, FBA fulfillment fees, size tiers, dimensional weight, price bands and the surcharge on top |
| 5.2 Storage, inbound and other fees | Monthly storage, inbound placement and low-inventory fees, aging surcharges, returns and refunds |
| Chapter 6: Sales tax and your margins | Why sales tax on your Amazon sales doesn't touch your margin, how sales tax on your purchases can, and how resale certificates change the math |
| Chapter 7: Profit, ROI and cash flow | The profit formula, ROI, break-even, choosing your minimums and how long your money is tied up |
Keep this Part nearby and come back whenever a number puzzles you. ArbiSource calculates Amazon's fees on every result for you. The goal here is to understand what those numbers mean, so you notice when one looks off and can make decisions with confidence.
Fees change from time to time.
The figures in this Part come from Amazon's official US pricing and Seller Central help pages. Before relying on one, open the live page we link to. If it shows something different, the live page wins.