Required information [The following information applies to the questions displayed below.) The following are the transactions for the month of July, Unit Selling Price July 1 July 13 July 25 July 31 Beginning Inventory Purchase Sold Ending Inventory Unit Cost $ 10 13 Unito 50 250 (100) 200 $ 15 Required: a. Calculate cost of goods available for sale and ending inventory under LIFO. Assume a periodic inventory system is used. b. Calculate sales, cost of goods sold, and gross profit, under LIFO. Assume a periodic inventory system is used. Complete this question by entering your answers in the tabs below. Required A Required B Calculate sales, cost of goods sold, and gross profit, under LIFO, Assume a periodic inventory system is used. LEO (Periodic) Sales Cost of Goods Sold Gross Profit