A company purchased 400 units for $20 each on January 31. It purchased 145 units for $30 on February 28. It sold 200 units for $45 each from March 1 through December 31. If the company uses 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.) $12, 350 $5, 450 $4, 350 $8,000