unit about excel
why we use spreadsheets? HOW we enter formulas
how do you type in - sum, multipication, percent, product, average of a cell or a bunch of cells?
What does your instruction manual say? Or maybe you have a textbook?
I found it very easy to begin using Excel simply by diving in. Anyone who has done this can tell you, but YOU need to do it for yourself.
If you get stuck, press the F1 key to get specific help from Microsoft.