Alta Ski Company's inventory records contained the following information regarding its latest ski model. The company uses a periodic inventory system. Beginning inventory, January 1, 2018 600 units @ $80 each Purchases: January 15 1,000 units @ $95 each January 21 800 units @ $100 each Sales: January 5 400 units @ $120 each January 22 800 units @ $130 each January 29 400 units @ $135 each Ending inventory, January 31, 2018 800 units 18. Costs of goods available for sale for both LIFO and FIFO should be: A. About the same amount B. The same amount C. Unusual amount D. Needs more information 19. Cost of ending inventory under FIFO should be: A. 60,000 B. 143,000 C. 223,000 D. 80,000 20. Cost of goods sold under LIFO should be: A. 67,000 B. 155,000 C.212,000 D. 156,000