If real GDP is $150 billion, full employment GDP is $600 billion, and the marginal propensity to consume is 0.8, then Congress should

increase government spending by $90 billion

Explanation:

in order to reach full employment GDP level, the government should increase its spending by $90 billion. Total GDP increase = increase in government spending / government multiplier = $90 billion / (1 - 0.8) = $90 billion / 5 = $450 billion.

GDP will increase from $150 billion + $450 billion = $600 billion

answer; normative economics;

since the options are not listed, when you are working on your budget you should also add water, tv, internet, miscellaneous and your 'fun' money for in your budget. when budgeting, you need to allow for fun money, and mis/accidental money so that you stick to the budget and not go crazy because you feel strapped to the budget.