XLSX formula inspector

Every formula is listed with the cached value Excel saved at its last save, sorted and filtered however you like. The audit flags cached errors such as #DIV/0!, references to other workbooks, volatile functions that recalculate on every edit, numeric constants other than 0 and 1 inside formulas, and formulas whose relative R1C1 form differs from two agreeing neighbours. Nothing is calculated, nothing runs: formulas show text, cached values show as stored, and a VBA project is detected, never opened. Formulas inside charts, conditional formatting, data validation, and pivot caches are not listed, and a formula that is consistently wrong passes the neighbour check. Workbooks written without cached values show blanks in that column.