net rebate in pricing procedure

Hi Guys:

            I have a requirement that there are several rebate condition types with tax in sales order, users want to get the rebate value without tax separately, because they will be in different G/L accounts.

            Is there any standard routine in pricing procedure can cover this?

            For example:

                   Condition<Input>           with tax       tax rate    

            Rebate condition type 1        110USD         10%          

            Rebate condition type 2        140USD         10%          

                  Condition<Output>          without tax

            Net Rebate condition type 1   100USD

            Net Rebate condition type 1    127.27USD

            I know SAP can get the total net rabate by routine 12<XWORKD - XWORKE>, but I want to separate.

            Thanks.

Stephen