Microsoft Excel

Then, you want to tell Excel what calculation you want done. In this case, we want the data in cells C4, D4, E4, and F4 added together. There are several ways to do this. One would be to simply type "=C4+D4+E4+F4." For short sums like this one, that is not a bad way to go. However, suppose we wanted to add up numbers from 25 columns. ................
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