Adding Formula Rows and Columns
You can define formulas for rows and columns. For example, you can create a formula column to calculate the percentage variance between monthly sales columns. The formula for a row or column applies to all row or column dimensions. To define or assign existing formulas to forms, select the row or column on the Layout tab, and use the options under Segment Properties.
See Creating Formulas.
Tip:
Consider adding a formula row between two other rows to create a blank row. Blank rows help you visually separate subtotals and totals in a form.
To add formula rows and columns: