Elkins Company had checks outstanding totaling $5,400 on its June bank reconciliation. In July, Elkins Company issued checks totaling $38,900. The July bank statement shows that $26,300 in checks cleared the bank in July. A check from one of Elkins Company's customers in the amount of $300 was also returned marked "NSF." The amount of outstanding checks on Elkins Company's July bank reconciliation should be:
a. $12,600.
b. $18,000.
c. $17,700.
d. $7,200.