Suppose that you have the following information for an economy:. Marginal propensity to consume - MPC 0.80 Autonomous consumption - A $500 Planned investment - PI $600 Net exports - NX -$400 Government spending - G $300
You will need this information for the questions that follow.
Part 1. When real GDP is equal to $4,500, aggregate expenditure is equal to $ .
Part 2. When real GDP is equal to $5,000, aggregate expenditure is equal to $ .
Part 3. When real GDP is equal to $5,500, aggregate expenditure is equal to $ .

Part 1. When real GDP is equal to $4,500, aggregate expenditure is equal to $4,600.

Part 2. When real GDP is equal to $5,000, aggregate expenditure is equal to $5,000.

Part 3. When real GDP is equal to $5,500, aggregate expenditure is equal to $5,400.

Explanation:

The aggregate expenditure (AE) can be calculated using the following formula:

AE = (A + (MPC * Y)) + PI + G + NX  ………………. (1)

Where;

AE = aggregate expenditure = ?

A = Autonomous consumption = $500

MPC = Marginal propensity to consume = 0.80

Y = Real GDP

PI = Planned investment = $600

G = Government spending = $300

NX = Net exports = -$400

Based on the above, we can now proceed as follows:

Part 1. When real GDP is equal to $4,500, aggregate expenditure is equal to $ .

This implies that:

Y = Real GDP = $4,500

Substituting this and other values given above into equation (1), we have:

AE = ($500 + (0.80 * $4,500)) + $600 + $300 - $400 = $4,600

Therefore, when real GDP is equal to $4,500, aggregate expenditure is equal to $4,600.

Part 2. When real GDP is equal to $5,000, aggregate expenditure is equal to $ .

This implies that:

Y = Real GDP = $5,000

Substituting this and other values given above into equation (1), we have:

AE = ($500 + (0.80 * $5,000)) + $600 + $300 - $400 = $5,000

Therefore, when real GDP is equal to $5,000, aggregate expenditure is equal to $5,000.

Part 3. When real GDP is equal to $5,500, aggregate expenditure is equal to $ .

This implies that:

Y = Real GDP = $5,500

Substituting this and other values given above into equation (1), we have:

AE = ($500 + (0.80 * $5,500)) + $600 + $300 - $400 = $5,400

Therefore, when real GDP is equal to $5,500, aggregate expenditure is equal to $5,400.

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