Professional Excel training workbook covering 57 formulas — Text, Lookup, Statistical, Financial, Logic, and Math formulas with real-world examples

Comprehensive financial analysis of customer invoices built with Excel. Utilizes formulas (SUMIFS, COUNTIFS), pivot tables, and a range of charts (Pie, Bar, and Scatter) to assess payment delays and evaluate revenue concentration risk.

kintone上の複数アプリを横断集計するダッシュボード（無料JSカスタマイズ）

attendance tracker using MS Excel

Perform element-wise evaluation of one or more input arrays according to provided predicate functions and count the number of elements for which all predicates respectively return `true`.