You can use the Sum function in Microsoft Office Excel to sum columns of data, whether your data is in an Excel table or is simply a range in a column of your worksheet.

How to Sum Across Worksheets in Microsoft Excel. Using multiple sheets in the same Excel workbook helps organize data into distinct categories. For example, you might have sales data for each of ...

These redundant records can throw off averages, sums, and other aggregate calculations. Fortunately, Excel makes it easy to identify and remove duplicates: Select the data range you want to ...