Riverbed Inc. is a retailer using a perpetual inventory system. All sales returns from customers result in the goods being returned to nventory. (Assume that the inventory is not damaged.) Assume that there are no credit transactions; all amounts are settled in cash. You are provided with the following information for Riverbed Inc. for the month of January. Using FIFO method, calculate (i) cost of goods sold, (ii) ending inventory, and (iii) gross profit. (Assume sales returns had a cost of $20 and purchase returns had a cost of $24.) Cost of goods sold $ Ending Inventory $ $ Using Average method, calculate (i) cost of goods sold, (ii) ending inventory, and (iii) gross profit. (Round average cost to 3 decimal places, e.g. 5.252 and final answers to 2 decimal places, e.g 5.25.) Cost of goods sold $ Ending Inventory $ $