Sometimes you need to perform similar calculations in different cells throughout a worksheet. For example, say you want to calculate sales tax on each item in a product catalog, the monthly sales in each store of a company, or the final grade for each student in a class. In this section, you'll learn how Excel makes it easy with relative cell references. Relative cell references are cell references that Excel updates automatically when you copy them from one cell into another. They're the standard kind of references that Excel uses (as opposed to absolute cell references, which are covered in the next section). In fact, all the references you've used so far have been relative references, but you haven't yet seen how they work with copy-and-paste operations.