Given the following data, calculate the cost of goods sold using the average -cost method. Round average cost per unit calculations to two decimal places. Round final answer to the nearest dollar. Date Item Unit Beginning inventory Purchase of inventory Purchase of inventory 70 units at $30 per unit 10 units at 530 per unit 10 units at $12 per unit 28 units 5/10 109 231 Ending inventory OA. $2,744 OB, $1,738 O c. $2,520 O D. $5,580