You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

How to Add the Difference Range In Excel. The simplest way to add cells in Microsoft Excel is using the plus operator, such as "=A1+A2," but that method fails when adding different ranges.

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.

Microsoft Excel PivotTables turn data into meaningful information, but it's difficult to add grand total rows. Read on to learn how.

If your business uses an Excel file to track sales information, you can use the SUM formula to add up all order totals.

The best new tool from Microsoft Excel is undoubtedly the SCAN function. Here's how to use it to calculate running totals. Find the full guide at Spreadsheet Point.