At the beginning of its operations in March 2024, Marin Supplies Ltd. began with 9,750 units of inventory that it purchased at a $7.50 each. The company's purchases during March were as follows: Marin 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.) At the beginning of its operations in March 2024, Splish Brothers Supplies Ltd. began with 8,160 units of inventory that it purchased at a cost of $7.50 each. The company's purchases during March were as follows: Splish Brothers Supplies uses a perpetual inventory system. (a) Calculate the cost of goods sold for March using the weighted-average cost formula. (Round calculations for cost per unit to 4 decimal places, e.g. 10.5219 and final answer to 0 decimal places, e.g. 61,052.) Cost of goods sold $ (b) Your answer is incorrect. Calculate the cost of goods sold for March using the first-in, first-out cost formula. At the beginning of its operations in July 2024, Sheridan Pet Shop Ltd. began with 8,740 units of inventory that it purchased at a cost of $14.60 each. The company's purchases during July were as follows: Sheridan Pet Shop uses a periodic inventory system. (a) Calculate the cost of goods sold for July 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.) Cost of goods sold $