Answer:
-$1.5 billion; trade deficit
Explanation:
A trade deficit occurs when the value of a country's imports exceeds value of its exports —with imports and exports referring both to goods, or physical products, and services. In simple terms, a trade deficit means a country is buying more goods and services than it is selling. An overly simplistic understanding means that this would generally hurt job creation and economic growth in the deficit-running country.
Balance of Trade formula = Country’s Exports – Country’s Imports.
South Korea imports=$4 billion
South Korea Exports=$2.5 billion
Balance of Trade formula=$2.5 billion-$4 billion=-$1.5 billion trade deficit