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File formats that are supported in Excel - Microsoft Support
How to Format Your Excel Spreadsheets (Complete Guide)
Formatting Worksheet in Excel: 11 Examples - ExcelDemy
Excel File Extensions: XLSX, XLSM, XLS, XLTX, and XLTM - Lifewire
Ways to format a worksheet - Microsoft Support
XLS vs. XLSX Files – What’s the Difference? - Spreadsheet Planet
A Quick Guide To All Excel File Extensions & What They Mean
Guidelines for organizing and formatting data on a worksheet
3 Ways to Format an Excel Spreadsheet - wikiHow
How to Format a Spreadsheet in Excel: Simple Tips and Tricks for ...