Calculate cost of goods available for sale and ending inventory, then sales, cost of goods sold, and gross profit, under LIFO. Assume a periodic inventory system is used. (Round "Cost per Unit" to 2 decimal places and your final answers to nearest whole dollar amount.) LIFO (Periodic) Units Cost per Unit Beginning Inventory Purchases July 13 Goods Available for Sale Cost of Goods Sold Total Cost of Goods Sold Ending Inventory LIFO (Periodic) Sales Cost of Goods Sold Gross Profit