Checkers uses the periodic inventory system. For the current month, the beginning inventory consisted of 7,200 units that cost $12 each. During the month, the company made two purchases: 3,000 units at $13 each and 12,000 units at $13.50 each. Checkers also sold 12,900 units during the month. Using the average cost method, what is the amount of cost of goods sold for the month?