Answer:
Closing inventory = $10,440 Â
Cost of goods sold = Â $6,600
Explanation:
Under the LIFO inventory system units of inventory are priced using the price of the most recent batch purchased and this continues in turn.
Cost of goods sold:
Units sold = 240 +480 + 780 - 950 = 550
The units of 550 sold will be priced as follows:
550 × $12 = $6,600
Closing inventory
= Â 950 units
This will be valued as follows:
230 ×  $12 =2,760
480 × $11 =5,280
240 × $10 =2,400
2,760 + 5,280 + 2,400= $10,440
Closing inventory = $10,440 Â
Note the 230 units is the balance of the batch of 780 units  after issuing the units sold i.e (780 - 550)
Closing inventory = $10,440 Â
Cost of goods sold: Â $6,600