Gamma uses a perpetual inventory system. Beginning inventory for the month of March was reported as 7,200 units that cost $12 each. During the month, Gamma reported the following transactions: March 3rd Purchase 3,000 units at $13 March 10th Purchase 12,000 units at $13.50 March 12th Sold 12,900 units at $18 Assuming Gamma uses a FIFO inventory costing method, what is the balance of ending inventory at March 31st? O $125,550 O $111,600 O $113,700 O $120,438