A company purchased 500 units for $20 each on January 31. It purchased 600 units for $24 each on February 28. It sold a total of 640 units for $45 each from March 1 through December 31. What is the cost of ending inventory on December 31 if the company uses the first - in, first-out (FIFO) inventory costing method? (Assume that the company uses a perpetual inventory system.) A. $6,260 B. $2,940 C. $9,200 D. $11,040