Answer:
D. $144
Explanation:
With this method the last merchandise entered is the first to come out of existence.
At the time of the sale of May 20, the situation was as follows.
5/3 Purchase 5 units $20
5/10 Sale 3 Units
5/17 Purchase 10 units $24
5/20 Sale 6
The cost of selling these 6 units corresponds entirely to the cost of the purchase of May 17. It does not matter that there are still 2 unsold units of the previous purchase in the warehouse since we are using the LIFO method. So 6 units x $24 = $144