How to view Material Allocation against multiple move orders?

Greetings,

     My question is : How to view the material allocations of specific item against different Move Orders?.

In other words let us suppose user A made a Move Order Issue request of item X by 100 as quantity . Then user B made same thing of a quantity of 200.

Then, warehouse keeper allocated both of these requests of item X from the subinventory : finished Goods, but he did not  issue the material . the next day an other move order request of same item with quantity as 300 is created and when the warehouse keeper tried to allocate the 300 quantity he could not, because all the on hand of item X in subinventory : finished Goods is already allocated for previous move orders. so how can he sees the details of the previous allocations of the item X. he wants to know for which move orders these allocations took place. i tried Move Order Pick Slip report but it was hard to extract the information from the report. I hope my question is clear.