I have a POS application for scrap metal recyclers.  They are buying scrap materials in many small transactions during the day..  At the end of the day, I want to consolidate all of these transactions into one 'purchase' for a single vendor that will update quickbooks with all of the item quantities and costs and create a payable amount for the vendor.  Subsequently, I want to update quickbooks with all of the payments that were made for these materials.

1. Can I receive these items into inventory and create a payable without creating a PO or will I have to create the PO first and then receive against it?

2. When I transfer the payments, will they automatically be applied to the outstanding amounts or will they have to be individually applied to specific PO's?