Final answer:
The correct answer to the student's question is a) Purchase order. This document is used after a purchase has been approved to outline the details of the transaction with the vendor.
Step-by-step explanation:
After approval of a purchase has been obtained, the purchasing agent completes a prenumbered purchase order that identifies the vendor, the delivery location, and the approved quantity and cost. Therefore, the correct answer is a) Purchase order. A purchase order is a document issued by a buyer to a seller, indicating types, quantities, and agreed prices for products or services. It serves as an authorization for the vendor to supply the goods or services and outlines the terms of the transaction. Once the goods are shipped or services are provided, the vendor invoice is generated, typically followed by a packing slip during shipment and eventually a receiving report to confirm the delivery.