Sum Some Values
Although you can write a formula that adds multiple cell references, one cell at a time, it's much easier to use Excel's SUM function to add up the contents of a range of cells. Here are two ways to enter the SUM function in formulas to create subtotals for the values in column B.
Use the AutoSum button:
Activate cell B6.
Click the AutoSum button on the Standard toolbar.
Excel writes a formula that uses the SUM function to add ...
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