In an Open Economy, Gross Domestic Product Equals $1,850 Billion

Multiple Choice

In an open economy, gross domestic product equals $1,850 billion, consumption expenditure equals $975 billion, government expenditure equals $225 billion, investment equals $500 billion, and net exports equals $150 billion. What is national savings?

A) $0
B) $500 billion
C) $650 billion
D) $975 billion