Microeconomics
Microeconomics
21st Edition
ISBN: 9781259915727
Author: Campbell R. McConnell, Stanley L. Brue, Sean Masaki Flynn Dr.
Publisher: McGraw-Hill Education
Question
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Chapter 9, Problem 3RQ

Subpart (a):

To determine

Calculate different costs.

Subpart (a):

Expert Solution
Check Mark

Explanation of Solution

Total cost (TC) can be obtained by using the following formula.

Total cost=Total fixed cost+Total variable cost (1)

Total cost at production level 1 unit can be calculated by substituting the respective values in Equation (1).

Total cost=60+45=105

Total cost is $105.

Average fixed cost (AFC) can be obtained by using the following formula.

Average fixed cost=Total fixed costQuantity (2)

Average fixed cost at production level 1 unit can be calculated by substituting the respective values in Equation (2).

Average fixed cost=601=60

Average fixed cost is $60.

Average variable cost (AVC) can be obtained by using the following formula.

Average variable cost=Total variable costQuantity (3)

Average variable cost at production level 1 unit can be calculated by substituting the respective values in Equation (3).

Average variable cost=451=45

Average variable cost is $45.

Total average cost (AC) can be obtained by using the following formula.

Total average cost=Total costQuantity (4)

Total average cost at production level 1 unit can be calculated by substituting the respective values in Equation (4).

Total average cost=1051=105

Average variable cost is $105.

Marginal cost (MC) can be obtained by using the following formula.

Marginal cost=Total costpresentTotal costpreviousQuantitypresentQunantityprevious (5)

Average variable cost at production level 1 unit can be calculated by substituting the respective values in Equation (5).

Average variable cost=105010=105

Marginal cost is $105.

Table-1 shows the total cost, average fixed cost, average variable cost, average total cost and marginal cost that obtained by using equations (1), (2), (3), (4) and (5).

Table -1

QuantityFixed costVariable costTCAFCAVCACMC
060060
160451056045.00105.0045
260851453042.5072.5040
3601201802040.0060.0035
4601502101537.5052.5030
5601852451237.0049.0035
6602252851037.5047.5040
7602703308.5738.5747.1445
8603253857.5040.6348.1355
9603904506.6743.3350.0065
1060465525646.5052.5075

Figure -1 illustrates the shape of total fixed cost, total cost and total variable cost that influencing by the diminishing returns to scale.

Microeconomics, Chapter 9, Problem 3RQ , additional homework tip  1

In figure -1, horizontal axis measures total output and vertical axis measures cost. The curve TC indicates total cost and the curve TVC indicates total variable cost. TFC curve indicates total fixed cost. Since total fixed cost is remain the same over the different level of production TFC curve parallel to the horizontal axis.

From the output range 1 unit to 4 units, total cost and total variable cost increasing at decreasing rate due to the increasing marginal returns. Thereafter, these two cost curves are increasing at increasing rate due to the diminishing marginal cost.

Economics Concept Introduction

Concept introduction:

Fixed cost: Fixed costs refer to those costs that remain the same regardless of the level of production.

Variable cost: Variable cost refers to the costs that change due to the changes occurring in the level of production.

Subpart (b):

To determine

Calculate different costs.

Subpart (b):

Expert Solution
Check Mark

Explanation of Solution

Figure -2 illustrates relationship between marginal cost, average variable cost, average fixed cost and average total cost curve.

Microeconomics, Chapter 9, Problem 3RQ , additional homework tip  2

In figure -2, horizontal axis measures total output and vertical axis measures cost. The curve TC indicates total cost and the curve TVC indicates total variable cost. TFC curve indicates total fixed cost. Since total fixed cost is remain the same over the different level of production TFC curve parallel to the horizontal axis.

Since the fixed cost is spread over all the output, increasing the level of output leads to reduce the average fixed cost over the increasing production. Marginal cost curve average variable cost curve and average total cost curve are U shaped due to the operation of economies of scale and diseconomies of scale.

Average total cost curve is the vertical summation of average fixed cost and average variable cost. When the marginal cost curve is below to the average total cost curve, then the average total cost falls. When the marginal cost lies above the average total cost curve then the average total cost curve start rises. Thus, marginal cost curve intersects with the average total cost curve at the minimum point.

When the marginal cost curve is below to the average variable cost curve, then the average variable cost falls. When the marginal cost lies above the average variable cost curve then the average variable cost curve start rises. Thus, marginal cost curve intersects with the average variable cost curve at the minimum point.

Economics Concept Introduction

Concept introduction:

Fixed cost: Fixed costs refer to those costs that remain the same regardless of the level of production.

Variable cost: Variable cost refers to the costs that change due to the changes occurring in the level of production.

Subpart (c):

To determine

Fixed cost and variable cost.

Subpart (c):

Expert Solution
Check Mark

Explanation of Solution

The increasing fixed cost from $60 to $100 leads to shifts the fixed cost curve upward (By $40). This increasing fixed cost does not affect the marginal cost. Thus, marginal cost curve and average variable cost curve remains the same.

The decrease in variable cost by $10 leads to reduce the marginal cost $10 at first level of output and remains the same for other level of output. Average total cost and average variable cost decreases as a result of decrease in the variable cost. But, average fixed cost remains the same.

Economics Concept Introduction

Concept introduction:

Fixed cost: Fixed costs refer to those costs that remain the same regardless of the level of production.

Variable cost: Variable cost refers to the costs that change due to the changes occurring in the level of production.

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Students have asked these similar questions
Situation 21-1 Diane's Donuts will begin selling donuts next week. Diane figures that the average variable cost to make each donut will be constant at $0.30. She has already paid $20,000 for the donut-making machinery and one year's rent. Refer to Situation 21-1. What will Diane's total variable costs be if she sells 36,500 donuts in one year? $10,950 O $18,450 $22,080 $12,500
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