i tried $127488 and it is wrong

please answer correctly

Waterway uses the periodic inventory system. For the current month, the beginning inventory consisted of 7000 units that cost $9.00 each. During the month, the company made two purchases: 3100 units at $10.00 each and 12200 units at $10.50 each. Waterway also sold 12800 units during the month. Using the average cost method, what is the amount of cost of goods sold for the month? (Round average cost per unit to 2 decimal places, es. 1.48.) $122350. $134100. $127488. $128000