Step 2 Now click the Layout tab and then click the Formula button. To insert a formula do the following. A calculating form field includes the fields formula.
To change the cell references from relative to absolute you just need to select the cell and go to the formula bar and place cursor at the cell reference you want to change and press F4 key to switch cell reference.
Go to Insert tab. Then click the tables Layout contextual tab in the Ribbon. Go to Insert tab. A calculating form field includes the fields formula.