A Shirts Company uses a periodic inventory system. During the first year of operations, the company made four purchases of a particular product. The first purchase includes 500 units at a cost of $9 per unit, the second purchase includes 500 units at a cost of $10 per unit, the third purchase includes 500 units at a cost of $12 per unit and the fourth purchase includes 500 units at a cost of $13 per unit, At year-end, 650 of these units remained unsold. Compute the cost of goods sold under the Weighted Average method