Fees for Amazon FBA vary depending on:
Product weight
Product size/dimensions
Where the product was sold (Amazon or an external site)
Products sold through Amazon FBA include costs for:
Amazon Fulfillment Fees: Fees start at $2.70 and can go up to more than $100 for oversized products.
Monthly Inventory Storage Fees: Storage fees range from $0.75/cubic foot to $3.63/cubic foot with a long-term storage fee of $6.90 per cubic foot or $0.15 per unit, whichever is greater. Long-term storage is storage for products beyond 365 days.