We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.

How to Calculate Finance Charges for Overdue Invoices. Getting your money is one of the most essential functions of a small business owner, and often one of the more unpleasant ones.

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