View Policies Show Attempt History Current Attempt in Progress Swifty Inc. uses a perpetual inventory system. Its records show the following for the month of May. Calculate the cost of goods sold for May and the ending inventory at May 31 using the average cost formula. (For average, ise 3 decimal ploces, es. 15.235 in your colculations and round final answers to 2 decimal places, e 5.25. Cost of goods sold $ Ending inventory $ eTextbook and Media