All answers are correct Except Your name.
Answer:$2
Explanation:
A company normally is expected to value it's inventory at the lower of cost or net realisable value. The cost price is the price on purchase of the inventory while the net realisable value is selling price less cost of sales and cost to completion.
The amount of the lower cost of market adjustment the company must make, is the difference between the new selling price of $15 and net realisable value of $13 which is $2.