1. Right-click anywhere in the view or right-click the Measure Items folder in view explorer, and select Insert Calculated Measure Item.
2. In the Expression window, set up the expression by:
Clicking or dragging and dropping objects from the View Items and Functions section to the Expression section.
Or, by manually entering text in the Expression section.
3. Use the Validate button as needed to check for any errors as you set up the expression.
4. Click OK.
5. {Optional} Customize properties for the measure item:
Note: See examples in Creating Expressions for Calculated Measure Items. See also When to Use the “Sum” Total Setting for Measure Items.