A company purchased 100 units for $30 each on January 31. It purchased 170 units for $40 each on February 28. It sold 225 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 31? (Assume that the company uses a perpetual inventory system.) O A. $6,800 O B. $3,000 OC. $9,800 OD. $8,450