JetTrac Calc™ Performs Arithmetic Field Calculations even across subforms.
Can create new data fields. If the field doesn't exist, JetTrac Calc will create it for you.

Works with subforms. JetTrac Calc can calculate new totals of subform data.
Runs on any platform. JetTrac Calc is written in Java so it runs on all platforms that support Java, including platforms that are not supported under Central.