Problem 4 Transactions for the month of June were: Purchases Sales June 1 3,200@ $3.20 June 2 2,400 @ $5.50 3 8,800 @ 3.10 6 6,400 @ 5.50 7 4,800 @ 3.309 4,000 @ 5.50 15 7,200 @ 3.40 10 1,600 @ 6.00 22 2,000 @ 3.50 18 5,600 @ 6.00 25 800 @ 6.00 Determine the Cost of Goods Sold, Ending Inventory and Gross Margin using FIFO, LIFO, and Weighted Average. Assume a perpetual inventory system.