A company purchased 400 units for $20 each on January 31. It purchased 520 units for $26 each on February 28. It sold a total of 540 units for $40 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.) O A. $5,640 O B. $1,960 O c. $9,880 OD. $7,600 Click to select your