Chapter 13, Problem 9PA

### Principles of Microeconomics

7th Edition
N. Gregory Mankiw
ISBN: 9781305156050

Chapter
Section

### Principles of Microeconomics

7th Edition
N. Gregory Mankiw
ISBN: 9781305156050
Textbook Problem

# Jane’s Juice Bar has the following cost schedules:a. Calculate average variable cost, average total cost, and marginal cost for each quantity.b. Graph all three curves. What is the relationship between the marginal-cost curve and the average-total-cost curve? Between the marginal-cost curve and the average-variable-cost curve? Explain.

Subpart (a):

To determine
An average total cost, average variable cost and marginal cost.

Explanation

Table -1 shows the variable cost and total cost schedule.

Table -1

 Quantity Variable Cost Total Cost 0 $0.00$30.00 1 10.00 40.00 2 25.00 55.00 3 45.00 75.00 4 70.00 100.00 5 100.00 130.00 6 135.00 165.00

Average total cost can be calculated by using the following formula:

Average total cost=(Total costQuantity) (1)

Substitute the respective value in the equation (1) to calculate the average total cost for quantity 1:

Average total cost=(401)=10

Thus, the average total cost for quantity 1 is $40 Average variable cost can be calculated by using the following formula: Average variable cost=(Variable costQuantity) (2) Substitute the respective value in the equation (2) to calculate the average variable cost for quantity 1: Average varible cost=(101)=10 Thus, the average variable cost for quantity 1 is$10

Marginal cost can be calculat

Subpart (b):

To determine
An average total cost, average variable cost and marginal cost.

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