Answer:
D. Purchase orders
Step-by-step explanation:
A purchase order is a document legally binding a buyer and a sellerr. It is the official confirmation of an order.
It entails the details of the items the buyer agrees to buy at a certain price, the delivery date and terms of payment for the buyer.
Purchase orders includes details such as purchase order number, the shipping date, billing address, shipping address, quantities and price.
Purchase orders are used when buyers want to purchase goods from a seller, and helps sellers to track payment. It is prepared by the buyers.