SheetRoutine Excel and Google Sheets tutorials that end with a working spreadsheet. Every formula is recalculated and checked, and the file is attached. 2026-11-10T00:00:00-07:00 https://sheetroutine.com/ SheetRoutine launches: two checked spreadsheet tutorials, files included https://sheetroutine.com/guides/loan-amortization-schedule/ 2026-11-10T00:00:00-07:00 A loan amortization schedule in Excel with PMT, IPMT and PPMT, and a price lookup with INDEX and MATCH. Both workbooks were recalculated in LibreOffice 24.2.7.2 and compared against independent computations; both files are attached. Build a loan amortization schedule in Excel with PMT, IPMT and PPMT https://sheetroutine.com/guides/loan-amortization-schedule/ 2026-11-10T00:00:00-07:00 A $25,000 loan at 6.5% over 5 years. Monthly payment $489.15, total interest $4,349.22, final balance $0.00. All 60 rows match an independent Python computation within $0.01. Look up a price in Excel with INDEX and MATCH https://sheetroutine.com/guides/price-lookup/ 2026-11-10T00:00:00-07:00 A price list with the SKU between the product name and the price, so VLOOKUP cannot reach left. HD-104 returns $21.50; a missing SKU returns “Not in price list”. XLOOKUP is shown for Excel 365/2021+ and Google Sheets, and measured as unsupported in LibreOffice 24.2.7.2.