Suppose that the federal government had a budget deficit of $80 billion in year 1
and $90 billion in year 2, but that it experiences budget surpluses of $40 billion
in year 3 and $20 billion in year 4. Also assume that the government uses any
budget surpluses to pay down the public debt. At the end of these four years,
the Federal government's public debt would have decreased by $110 billion.
Note: Only enter the value and NOT the dollar sign symbol "$"
