A cell reference is simply a way of identifying a specific cell in your spreadsheet.

Open a New Worksheet; Launch Excel and create a new worksheet named "June." Type "Sales" in cell A1 and "1000" in cell B1. Do not place parentheses around these values.

Microsoft Excel updates cell references when you copy an expression. Here are a couple of workarounds for those rare occasions when you don't want to change the cell references.