The formula book you wish you had.Excel is all about formulas. Think through how to do a calculation once, make sure it is correct, then copy it to other cells and use it as many times as you need to. In this lesson, you will learn some of the most popular (and few not so popular) formulas, you will review their syntax, how to use them, and you will also learn some other non-formula tricks that will make your life much easier. Let the computer...