Now, let’s create a formula in cell G2 that will populate all amounts to be financed by selecting all selling prices and subtracting all down payments. The formula is =B2:B10-F2:E10 or =B2:B10F2#.

We can use it the same as any other built-in Excel function. The custom function will be available only in the workbook where it was created, not in all of your Excel workbooks. Let’s put our cursor ...

Serious Excel users need to understand how to create formulas, develop macros, and perform functions to get the most out of this venerable software.