Purchase Order (PO) is an invoice that contains information about the purchase number, type of goods to be purchased, quantity of goods, price, total to be paid, delivery date, payment terms, etc. So in relation to controlling finances and costs, Purchase Orders can prevent errors in the price or quantity of goods when received at the warehouse, Send Purchase Orders to the Finance Department to prepare funds to pay for goods to be purchased, Help auditors and Tax Institutions to verify that transactions the purchase has been made correctly.