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. Item Unit Date 1/1 Beginning inventory 30 units at $20 per unit 5/10 Purchase of inventory 30 units at $30 per unit 10/9 Purchase of inventory30 units at $12 per unit 12/31 Ending inventory 48 units OA. $1,612. $1,628. B. OC. D. $868 $1,860