A company purchased 400 units for $30 each on January 31. It purchased 115 units for $40 each on February 28. It sold 175 units for $55 each from March 1 through December 31. If the company uses the last-in, first-out inventory costing method, what is the amount of Cost of Goods Sold on the income statement for the year ending December 317 (Assume that the company uses a perpetual inventory system.) OA. $12,000 OB. $4,600 OC. $6,400 OD. $16,000 CD