There is nothing more frustrating than when someone pastes a value on top of a formula in your spreadsheet. This can ruin a beautiful excel model. And it can take awhile to fix because you have to ...

Labels – headings and descriptions to make the spreadsheet easier to understand. Formulas – calculations that update automatically if referenced data changes.

3. Type the function you want to add to the formula. For example, if you want to sum up a column of numbers, type "SUM" and click SUM when you see it appear in the list of functions. 4.