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To calculate the sum of the products of corresponding numbers in one or more ranges, use Excel's powerful SUMPRODUCT function. 1. For example, the SUMPRODUCT function below calculates the total amount spent. Note: the SUMPRODUCT function performs this calculation: (2 * 1000) + (4 * 250) + (4 * 100) + (2 * 50) = 3500. 2. The ranges must have the same dimensions or Excel will display the #VALUE! error.
The only thing you have to do is change both fot he 44's to the row number just above the row containing the word Totals in what looks like Column A to me. In other words, the ranges specified in the SUMPRODUCT function should only range through your data and not your summary totals at the bottom.