The following data are for the Evans Company, which seils just one product Units Unit Cost 200 Beginning inventory January 1 Purchases Sales February 11 May 18 October 23 March 1 July 1 500 400 100 400 400 $40 $56 $64 580 Calculate the value of ending inventory and cost of goods sold using the periodic method and (a) first-in, first-out, (b) last-in method.