If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

How to Make a Drop-Down List to Choose a Date in Excel. Microsoft Excel lets you create simple forms that your users can enter data. To save them time and make sure you get the information you ...

If PDF text or content disappears when editing, saving or printing files using Adobe, Foxit, etc, then this post will help you troubleshoot the issue.

Use Microsoft Excel to calculate EBITDA (earnings before interest, tax, depreciation, and amortization) profit margin.