Guidance regarding calculated fields and measures in Jasper.
CA Service Management 17.2 and higher
You can create new fields or measures in an Ad Hoc view by applying formulas to a view’s existing fields and measures. For example, consider a view that includes both a Cost and a Revenue field. You could calculate the profit for each record by creating a custom field that subtracts the Cost field from the Revenue field. For example, you can divide the Profit custom field in the previous example by the Revenue field to express each record’s margin as a percent.
If you have installed the samples, the Ad Hoc view Calculated Fields and Measures will provide many examples: