Create a formula
- In the design window, make sure the spreadsheet is activated. For instructions, see Help for your design program.
- Click the cell in which you want to add a formula.
- Type an equal sign (=).
- Type the formula.
- Press ENTER.
TipTo insert a sum for a range of cells automatically, select the
first blank cell that follows the data you want to sum, either below the column
of data or to the right of the data in a row, click AutoSum 
on the spreadsheet toolbar, and then press ENTER.