Answer:
$180
Explanation:
Under the perpetual inventory method, Inventory balance is adjusted for every purchase or issue.
With FIFO, the system is such that items purchased first are issued out first.
As such, the cost of goods sold for the 22 units issued out will be
= $8 * 20 + $10 * 2
= $160 + $20
= $180
Since FIFO is the method used, 20 items would be sold from the opening inventory balance and then 2 from the items purchased on August 3.