need logic for sales data

Hi all,

I need small logic ...

VBELN ITEM PSTVY SPART PRCTR NETWR

2767 10 ZTAC 10 1008 234.00

2767 20 TAC 18 1801 3456.00

2767 30 ZTAC 10 1008 234.00

2767 40 ZTAC 10 1008 234.00

2767 50 TAC 10 1008 234.00

i want the update the SPART and PRCTR for evey item what ever the Item have PSTVY = TAC

means Update the all the line item material profit centre and division to tools (TAC) Configurable material profit center and division. like below.

VBELN ITEM PSTVY SPART PRCTR NETWR

2767 10 ZTAC 18 1801 234.00

2767 20 TAC 18 1801 3456.00

2767 30 ZTAC 18 1801 234.00

2767 40 ZTAC 18 1801 234.00

2767 50 TAC 10 1801 234.00

please help me in this.

regards,

Rama