Which document authorizes the purchase of the inventory from an approved vendor?

a. the purchase order

b. the petty cash voucher

c. the receiving report

d. the vendor's invoice?

The purchase order authorizes the purchase of the inventory from an approved vendor of the company. After checking the qualifications of the vendor, the company would issue a purchase order to indicate their intention purchase the item. This document indicates the types of the product to be purchased, the quantity and its corresponding prices.