1. Formulas are used to calculate cells. All formulas must begin with an equals (=) sign. Also, when creating formulas, use the cell location, not what is in the cell to create your formula.
    1. Example:   =C4+D4+E4      


 

  1. After you type in the formula, press the [Enter] key on your keyboard. The formula will be replaced by the result in that cell.