Answer:
To close this gap, contractionary policies should be adopted.
Explanation:
The consumption expenditure is given at $500 billion.
The investment expenditure is $50 billion.
The government purchases will be $100 billion.
And, net exports are $20 billion.
GDP
=C+I+G+NX
=$(500+50+100+20) billion
=$670 billion
The GDP at this point is greater than the full employment level of GDP.
This shows that there is inflation in the economy.
So, the government needs to adopt the expansionary monetary and fiscal policy. It can decrease spending or increase taxes to close the GDP gap.