At the bottom of each column you can display a total row and apply a simple math function like "Display the sum of this column" Totals will only be displayed if the "Display Totals" option is ON. To turn this option ON please see Appearance.
To add a total at the bottom of the column follow these steps:
3. Using the Type dropdown in the Math Function section select SUM
4. Click OK
Using The Durkin Toolkit for ACT! there are several ways to apply math functions other than the total. These additional math functions and calculations are descibed in more details in the Math Functions section.