Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Charlene Rhinehart is a CPA , CFE, chair of ...

In Excel, custom input or error messages explain the rules for each field to prevent data-entry errors. Imagine, for instance, that it’s your job to create ...

Monitoring sales revenue allows you to track your business' profit, but equally important is understanding where those revenues are derived. If you sell multiply products, or categories of products, ...

Using Excel, you can define and calculate placement of data within the spreadsheet by specifying the column and row identifiers together. The columns are identified using letters across the top bar on ...