the answer is: Trade surplus of $8 billion
Trade surplus when the monetary value of our exports exceed the monetary value of our import.
Deficit occurs when the monetary value of our imports exceed the monetary value of our exports.
From the question , we know that South Korea's export is around $ 17 Billion and its import is $9 Billion.
Since the exports exceeds the imports, south korea is experiencing trade surplus of:
$ 17 Billion - $ 9 billion = $ 8 Billion