Amazon’s reimbursement amounts are based on their assessment of the “fair market value” of the item, which often doesn’t align with your sale price or cost. To recover the full amount, you can appeal by opening a case in Seller Central and providing evidence of the item’s actual value, such as invoices, recent sales data, or proof of your cost price. Highlight discrepancies in their calculation and emphasize the financial loss. Additionally, consider using third-party reimbursement services or tools to audit and appeal FBA reimbursements if you’re facing frequent underpayments.