collective requirement after MRP RUN

can u tell me please

I am having one plant(P) , material "M" maintained in two different storage location(S1 & S2),two different Sales organisation (so1 & so2),having two different finish goods (P1 & P2) where material M is common in both P1 & P2.

when i book sales order @ so1 & so2 for P1 & P2 of Qty 2no & 5no resply

after MRP run i got requirement of M of 2no & 5no.

i have to docollective requirement

after doing collective requirement of M will be 7 no

,i place order for 7 no,

when i do the GR(MIGO),how will i come to know,how many qty belongs to which sales order & which storage location....

as my scenario is MTO

Regards

Jalu