Problem in Billing in routine

Hello,

     i create routine for billing in VF04. in that when we create billing in VF04 and in that it will take a one condition type price then it finds its range and by this range it will count with percentage then it will give a final value. i want to move this final value to other condition type. so please tell me how can i do this?

For example two condition type PR00 and ZRCT. now when i create billing at that time system will take PR00 price then it finds its pricing range and it will count with given percentage and after i get a final price. now i want to move this final price in ZRCT condition type. so please tell me how can i solve this problem? any suggestion will help me to solve out this problem.

Thanks & Regards.