The following data regarding purchases and sales of a commodity were taken from the related perpetual inventory account May Balance 25 units at $40 5 Purchase 15 units at $43 6 Sale 8 Purchase 10 units at $45 16 Sale 20 Purchase 25 units at $46 23 Sale 30 Purchase 15 units at $50 0 units 15 units 15 units FIFO LIFO COGS May 6 COGS May 6 COGS May 16 COGS May 16 COGS May 23 COGS May 23 Ending Ending inventory in units nventory in units Ending inventory at cost nventory at cost Ending