suppose the marginal propensity to consume (mpc) is either 0.4, 0.85, or 0.65. a. for each value of the mpc, calculate the expenditure multiplier, or the impact of a one-dollar increase in government spending on gdp. instructions: enter a number rounded to one decimal place in each blank. mpc expenditure multiplier 0.4 0.85 0.65 b. for each value of the mpc, calculate the impact on gdp of a $250 million increase in government spending. instructions: enter a number rounded to one decimal place in each blank. mpc impact on gdp 0.4 $ 0.85 $ 0.65 $ c. which of the following best describes the relationship between the mpc and the impact of a change in government spending on gdp.