Which Step needs a change in the delivered app engine CA_LIMITS to reverse Revenue Processed Amount

Hi,

Can anyone tell me, which steps in the delivered app engine CA_LIMITS need modification to reverse the Revenue Processed Amount i.e. LMT_PROC_AMT_R just like Billing Processed Amount LMT_PROC_AMT_B when WTO transaction is done through update billing worksheet and Limit check is performed by running CA_LIMITS. Currently only Billing Processed Amount changes when WTO are done but Revenue Processed Amount remains same. I want revenue processed amount to be changed in the same way as Billing Processed Amount and want to customize CA_LIMITS app engine for that. Can you please tell me which step needs to be modified for this change