To Apply a Function Using Excel:

• Choose the cell where you want to use the function.
• Choose the Formulas tab on the Ribbon.
• Choose the Insert Function option on the Ribbon under the Formulas tab.  An = sign will appear in the cell to let you know that a formula will follow.  A Insert Function dialog box will also appear.
• Type the description of the function you want to use and choose Go to see a list of possible functions.
• Choose the Function you want to use in your Excel document and choose OK.  A Function Argument dialog box will appear on your screen.
• Choose the cells for each argument.  When you finish building the arguments, choose OK.