Dekin Company had checks outstanding totaling $6,400 on its May bank reconciliation. In June, Dekin Company issued checks totaling $39,900. The July bank statement shows that $29,700 in checks cleared the bank in July. A check from one of Dekin Company's customers in the amount of $300 was also returned marked "NSF." The amount of outstanding checks on Dekin Company's July bank reconciliation should be which of the following?

A. $19,600

B. $10,200

C. $16,600

D. $3,800