A supplier informed the accounting department that they were paid $2,700 when the invoice was $3,000. Upon investigation, it was confirmed that the correct amount of materials was received but the payment was processed using an old price. How can the accounting department prevent this problem from recurring? Select answer from the options below match the purchase order, receiving report, and vendor invoice match the purchase order, packing slip, and vendor invoice match the purchase requisition, receiving report, and vendor invoice match the purchase order, receiving report, and customer invoice