What is the procedure in Zoho Books to receive a partial PO fulfillment (say I only get 3 of 5 items I ordered), and copy that to a bill.  Also, when I do get the other 2 items I want to then close out the PO and create another bill.

 A similar question related to Sales Orders.  What if the partial items from the PO only fill a partial Sales Order.  Can I send a partial have the Pack Slip and Invoice show something like 3 shipped, 2 backordered?