strategy 40 with typical scenario

Hi Gurus,

My Client uses strategy 40.MTS

Say Material A and B.In the current scenario,If the PIR for A is 1000,and the Sales Order is 200.Now planned Order will be created for A and B.

Qty of A planned Order will be 1000 and Qty of B planned Order will be 200.

But what my client wants is ,Planned Order for A should be 800 and Planned Order for B should be 200.

ie) My Sales Order of B should consume PIR of A.

Is it Possible or not in Standard SAP or by chnaging the Strategy? Can Planning Material concept can be used?

Kindly Suggest.

GIdeon Gunasekar