# E-Commerce & Payment Fee Margin Calculator #14 (2.8% + $0.34) (`ecommerce-unit-economics-calc-14`)
- **Status**: 200 OK | **Latency**: 1ms | **Cached**: true
- **Primary Authority**: 100% Platform E-Commerce Unit Economics Engine
- **License & Trust**: 100% Platform Deterministic Compute / Open Reference (computed_by_platform)
- **Verified At (UTC)**: 2026-10-27T15:17:11.246Z
- **Data Freshness**: cached
## Structured Data
```json
{
  "gross_order_value": 100,
  "cogs": 35,
  "gateway_fee": 3.14,
  "net_contribution_margin": 61.86,
  "break_even_roas": 1.62
}
```
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