You can type in the Formula box select a number. Get the complete tutorial FREE. To do this click inside the last cell in the fourth column click on Layout in the ribbon and then click on Formula at the far right.
Step 3.
In the Formula dialog box. Click in a cell that should contain the sum of the rows. The Formula popup in Word 16 Under Formula Word takes a guess as to the formula you might want to use and displays SUM LEFT. If you have complex formulas dont attempt this in Word.