Zahler Company had the following transactions for the month of June: Requirements: a) Assuming that periodic inventory records are kept, compute the cost of goods sold and ending inventory for June using (a) LIFO, (b) FIFO, and (c) Average Cost. b) Assuming that perpetual inventory records are kept, compute the cost of goods sold and ending inventory for June using (a) LIFO and (b) FIFO. c) Assuming that Zahler used FIFO perpetual, compute gross profit for June