Swift Ltd. uses the perpetual inventory system and reports the following inventory transactions for the month of June: Date Explanation Beginning inventory Units 1,580 Unit Cost/Price $4 Total Cost $6,320 June 1 12 Purchases 2,320 5 11,600 15 Sale (2,670 12 16 Purchases 4,700 6 28,200 23 Purchases 1,620 7 11,340 27 Sales (5,830 15 (a) Determine the cost of goods sold and the cost of the ending inventory using (1) FIFO and (2) Average cost. (Do not round