I'm having a hard time with LIFO, on the cost of good sold -Periodic (LIFO) . Altira Corporation uses a periodic inventory system. The following information related to its merchandise inventory during the month of August 2016 is available: Aug.1 Inventory on hand5,000 units; cost $7.90 each. 8 Purchased 22,000 units for $6.70 each. 14 Sold 16,000 units for $13.20 each. 18 Purchased 12,000 units for $6.20 each. 25 Sold 15,000 units for $12.20 each. 31 Inventory on hand8,000 units. total unit 15,000 unit of sold for aug 18 is 12,000 how do I calculate the Aug. 8 of unit sold?