RPCALC is a trial payroll calculation for one pay header. RPCALC is run from the [IPPH] screen by pressing the [Trial Pay|ACT_LAUNCH_TRIAL] button. 

The RPCALC will produce a pdf report of the payroll calculations generated for the pay. All calculations will be done as if the pay was being officially calculated, at the end of the calculation the system will 'rollback' the results, allowing the pay to be recalculated again.