Default Ship-To Location and Exchange Rate Type in PO

Hi,

We are using R12.1.3.

1) Our buyer uses the Demand Workbench to convert a Purchase Requisition to Purchase Order. Everytime they do it the PO defaults the Ship-To Location from Financials Options. Our requirement is to default the Delivery-To Location from the Requisition. We are not grouping requisitions rather buyer selects each requisitions and convert them to a PO. All these are done manually.

2) Also, when a requisition contains the currency exchange rate then the PO defaults the exchange rate based on Document Default (Purchasing Options) where as the expectation from the Buyer is to default exchange rate as per the requisition.