Hi,
Is there any difference between the quantity received through requisitioner A and requisitioner B?
The inventory can be tracked at storage location level on quantity basis. If you have batch management activated, you may insert external batch number in pr / po and hence you can track the quantity based on batch.
If you are not using batch, you can track the total quantity only at storage location level. You may also check the feasibility of separate storage location also.
Regards,
AKPT