At December 31, Marker reported the following items: cash, $7,500; inventory, $3,900; accounts payable, $5,900; accounts receivable, $3,100; common stock, $6,000; property, plant, and equipment, $10,500; interest payable, $1,600; retained earnings, $11,500. What is the total of Marker's current assets? a. $12,100 Ob. $25,000 c. $14,500 d. $13,700