When it comes to changing fonts in Excel 2007 it's as simplistic as a right click on the cell, or range of cells you wish to modify or change your fonts. After you right click simply go over to the formatting toolbar and click on the font arrow to choose another font, or click B for Bold and so forth. On the Ribbon, Home Tab in the Font group you can click on its expandable Dialogue box button to view more detailed options when it comes to modifying your fonts like adding a Strikethrough, where you currency has a line going through it, like you're slashing prices or to show what the old price was. Remember the expandable Dialogue box button is found in lower-right corner...

Purchase the training video and you can see this in action for yourself!