Minor Company had checks outstanding totaling $5,407 on its April bank reconciliation. In May, Minor Company issued checks totaling $40,849. The May bank statement shows that $25,832 in checks cleared the bank in May. A check from one of Minor Company's customers of $640 was also returned marked "NSF." The amount of outstanding checks on Minor Company's May bank reconciliation should be

a. $19,784

b. $20,425

c. $66,681

d. $20,424