Required information affected its merchandise inventory during Altira Corporation uses a perpetual inventory system. The following transactions the month of August 2018: Aug.1 Inventory on hand 2,000 units; cost $6.10 each 8 Purchased 18,000 units for $5.50 each. 14 Sold 8,000 units for $12.00 each. 18 Purchased 6,08e units for $5.00 each. 25 Sold 7,000 units for $11.00 each. 31 Inventory on hand-3,000 units