Calculation Methodology

Shared calculation engines are used instead of duplicating formulas page by page. Money-critical arithmetic keeps more precision internally than is displayed, with explicit rounding rules and reconciliation between hero metrics, charts, schedules and exports.

Evergreen formulas are tested with golden examples and edge cases. Regulatory, tax, marketplace and live/reference data use versioned source packages with effective dates, last-verified metadata and truthful stale/unavailable fallbacks.