At the beginning of its operations in March 2024, Windsor Supplies Ltd. began with 9,300 units of inventory that it purchased at a cost of $7.50 each. The company's purchases during March were as follows: Windsor Supplies uses a periodic inventory system. (a) Calculate the cost of goods sold for March using the weighted-average cost formula. (Round calculations for cost per unit to 2 decimal places, e.g. 10.52 and final answer to 0 decimal places, e.g. 61,052.)