Cumulating split wage types

Hi Experts

I have a custom PCR to round-off individual wage types(customer requirement). This PCR has been inserted in the schema after XVAL. However, in case of splits, the PCR is rounding off the wage types for individual split resulting in discrepancies.

Ex.

3 100x Dummy A01                                                   1,637.41

3 100x Dummy A02                                                   3,684.18

3 10 Dummy A03                                                      7,368.41

Individual splits are being round-off, so 1637.41 is getting rounded off to 1637 and so on. So the total amount comes to 12689 which is Re. 1 less.

I want the PCR to first cumulate the splits i.e. (1637.41+3684.18+7368.41)=12690 and then apply the round off, if needed.

Please help.