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Shipping, Ecommerce & WarehouseGenerated accuracy model review: 2026-05-06
Product Bundle Margin Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Bundle profit = bundle price - item costs - packaging cost - fulfillment cost - discount cost. Bundle margin percent = bundle profit / bundle price x 100.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Bundle Price: $95
- Total Item Costs: $38
- Packaging Cost: $3.25
- Fulfillment Cost: $6
- Discount Cost: $7.5
Expected outputs
- Bundle Profit: $40.25
- Bundle Margin: 42.37%
- Total Bundle Cost: $54.75
- Cost Share of Price: 57.63%
Known limitations
- These calculators do not fetch live carrier rates, marketplace fees, duty schedules, ad platform data, exchange rates, tax rates, or fulfillment provider pricing. Enter the current assumptions that apply to your store.
Assumptions
- All prices, costs, rates, duties, shipping charges, and campaign assumptions are user-entered.
- Calculations are deterministic and run locally in the browser without uploading ecommerce or customer data.
- Results are planning estimates and do not include every tax, refund, chargeback, inventory, financing, or accounting adjustment.
Unit handling
- Bundle Price accepts values in $.
- Total Item Costs accepts values in $.
- Packaging Cost accepts values in $.
- Fulfillment Cost accepts values in $.
- Discount Cost accepts values in $.
- Bundle Profit is displayed as currency.
- Bundle Margin is displayed as a percentage.
- Total Bundle Cost is displayed as currency.
- Cost Share of Price is displayed as a percentage.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Currency outputs are displayed with standard US dollar formatting.
- Percent outputs are displayed with two decimal places.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current product-bundle-margin-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Product Bundle Margin Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.