Practice 5.4 - Calculate ending inventory and cost of goods sold using FIFO, LIFO, weighted aver and specific identification methods. Assume the perpetual method. For specific ID assume ending inventory includes 15 units from the May 15th purchase and 5 units from the May 5th purchase. Practice 5.5 - Calculate ending inventory and cost of goods sold using FIFO, LIFO, weighted average and specific identification methods. Assume the narnatual math. For specific ID assume ending inventory includes 60 units from the 2/4 purchase and 40 units from the 2/25 purchase