Tomasson Inc. is a Danish firm located in Copenhagen. The firm had checks outstanding totaling DKK 12,800 on its May bank reconciliation. In June, the firm issued checks totaling DKK 79,800. The July bank statement shows that DKK 71,400 in checks cleared the bank in July. A check from one of the firm's customers in the amount of DKK 2,000 was also returned marked "NSF." The amount of outstanding checks on the firm's July bank reconciliation should be

a. DKK 23,200

b. DKK 19,200

c. DKK 8,400

d. DKK 21,200