In an Open Economy,gross Domestic Product Equals $3,500 Billion,consumption Expenditure

Multiple Choice

In an open economy,gross domestic product equals $3,500 billion,consumption expenditure equals $2100 billion,government expenditure equals $400 billion,investment equals $800 billion,and net exports equals $200 billion.What is national savings?

A) $200 billion
B) $600 billion
C) $800 billion
D) $1,000 billion