LIFO method
Units Available for sale = 25 + 20 + 30 + 15 = 90 units
Ending Inventory = 24 units
Units Sold = (90 – 24) = 66 units
Cost of Goods Sold
Sales from September = 15 units x $45 = $675
Sales from June = 30 units x $38 = $1140
Sales from March = 20 units x $42 = $900
Sales from Beginning Inventory = 1 unit x $25 = $25
Total: 66 units = $2740
Ending Inventory from beginning inventory = 24 units x 35 = $840