Answer:
The answers are: 
A) Using FIFO, the inventory cost is $11,700 
B) Using LIFO, the inventory cost is $7,500 
C) Using ACV, the inventory cost is $9,435 
Explanation:
<u>Date</u>              <u>Units purchased</u>     <u>Unit price</u>         <u>Total purchase</u>
Jan. 1              2,500 units            $5 per unit           $12,500
Feb. 17            3,300 units            $6 per unit           $19,800
July 21            3,000 units            $7 per unit           $21,000
Nov. 23          1,200 units             $8 per unit           $9,600
TOTAL           10,000 units                                        $62,900
At December 31, 1,500 units were left in the physical inventory
- Using FIFO, the inventory cost is $11,700 [= (1,200 units x $8 per unit) + (300 units x $7 per unit)]
- Using LIFO, the inventory cost is $7,500 (= 1,500 units x $5 per unit)
- Using ACV, the inventory cost is $9,435 [= ($62,900 / 10,000 units) x 1,500 units]