$18-20($Objectives $18-3,18-6)$ The following questions concern the audit of accounts payable.

a $.$ For effective internal control, the accounts payable department generally should

$(1)$ stamp, perforate, or otherwise cancel supporting documentation after payment

is mailed.

$(2)$ ascertain that each requisition is approved as to price, quantity, and quality by

an authorized employee.

$(3)$ omit information about the quantity ordered on the copy of the purchase order

forwarded to the receiving department prior to receipt of goods.

$(4)$ establish the agreement of the vendor$$s invoice with the receiving report and

purchase order.

b $.$ When using confirmations to provide evidence about the completeness assertion for

accounts payable, the appropriate population most likely is

$(1)$ vendors with whom the entity has previously done business.

$(2)$ amounts recorded in the accounts payable subsidiary ledger.

$(3)$ payees of checks drawn in the month after year$-$end.

$(4)$ invoices filed in the entity$$s open invoice file.