Reqisition creation

In a given requistion of say 100 quantity can we specify the source type a inventory for 30 quantity and source type as supplier for the remaining quantity and complete the requsition.

The process at the client site is a sbelow :

At project site requestor submits the paper requisition with the mgr approving it i.e signing on the paper requisition.

PR comes to the purchase department.Unit Head assigns the PR to the buyer

Buyer will send the same to the Central Warehouse to check the availability..

If stock available partially ,Central warehouse transfers to the project site

and the remaining not availble stock follows the RFQ,Quotaiton process to get the remaning iitems procured form the supplier.