Adding a running total to a simple Microsoft Excel revenue sheet isn't difficult, but adding a conditional running total will require a bit more effort. Solutions are simpler than you might think.

You can reference a list on another sheet, but it takes a bit more work. In this tutorial, I’ll show you how to populate a dropdown with data on another sheet.

Save this for the spreadsheet jocks in your office—we'd bet even the experts don't know all of these formula tips.