Greneer Company had checks outstanding totaling $10,800 on its June bank reconciliation. In July, Greneer Company issued checks totaling $77,800. The July bank statement shows that $52,600 in checks cleared the bank in July. A check from one of Greneer Company's customers in the amount of $600 was also returned marked "NSF." The amount of outstanding checks on Greneer Company's July bank reconciliation should be which of the following?