Ecommerce Profit Engine

Production Calculator: common economics engine + isolated Amazon, Shopify, Etsy, eBay and TikTok Shop adapters + exact break-even logic.

Stage 1B • Production Calculation Engine

Global Ecommerce Profit Engine

One common calculation layer with five isolated marketplace fee adapters. Break-even price is solved to the nearest cent against the complete active cost model.

Marketplace & market

Marketplace

Market

The calculation architecture is market-aware. This V1 runs the configured United States fee assumptions; additional country packs should be added as data, not by changing the core formula.

Common economics

Product price ($)

Customer-paid shipping ($)

Sales tax collected ($)

Seller discount ($)

Platform-funded discount ($)

Orders / month

COGS / order ($)

Inbound / packaging ($)

Seller-paid shipping / label ($)

Fulfillment / 3PL ($)

Other operating cost / order ($)

Return / refund rate (%)

Return handling / returned order ($)

Amazon fee model

Amazon

Profitability

Profit / order

$0.00

Net margin

0.0%

Monthly profit

$0.00

Exact break-even price

$0.00

Max additional ad spend / order

$0.00

Fee & cost waterfall

Amazon methodology

Integration validation

Automated regression checks run against the common engine and all five marketplace adapters.

Planning estimate

Calculator outputs depend on the assumptions entered and may differ from actual marketplace statements, taxes, refunds, advertising results and seller-specific terms. Verify current official seller documentation before making a commercial decision.