{"example_only":true,"service":"fba_fbm_cost_comparison","note":"Illustrative output from synthetic product facts; paid results depend on supplied facts.","name":"Amazon FBA vs FBM Cost Comparison Worksheet","marketplace":"amazon_us","input_summary":{"sku":"NORTHWIND-CHARGER","sale_price":29.99,"monthly_units":300,"basis":"seller-supplied FBA and FBM costs"},"output":{"sku":"NORTHWIND-CHARGER","referral_fee_per_unit":4.5,"fba_variable_cost_per_unit":18.23,"fbm_variable_cost_per_unit":21.5,"fba_monthly_contribution":3468.45,"fbm_monthly_contribution":2522.45,"recommended_mode_by_supplied_costs":"fba","monthly_advantage":946.0,"artifact_name":"fba-vs-fbm-cost-comparison.xlsx","safety":"Seller-supplied arithmetic only; no live fees, demand forecast, account change, or financial recommendation."}}