Back to back order query

We are on 12.2.12 and are in the process of implementing back to back order functionality with one of our internal suppliers using a different ERP. The order is placed in AUD however the purchase order needs to be created in USD based on intercompany price list, auto approved and copy of PO sent to the internal supplier without any manual intervention on the PO . I have created a contract purchase agreement in USD without any lines and created the price list in purchasing module. Created sourcing rules and approved supplier list and setup the auto approval

However the requisition does not convert to PO and errors out without any price when the requisition import is run as part of back to back order standard process. When i then create a standard supplier quotation in USD with the item , and then run the requisition import the PO does get created automatically and fetches the price correctly from the price list setup .