Economics
5th Edition
ISBN: 9781319066604
Author: Paul Krugman, Robin Wells
Publisher: Worth Publishers
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Question
Chapter 11, Problem 9P
To determine
Concept Introduction:
Here,
- AFC is the average fixed cost.
- AVC is the
average variable cost . - ATC is the average total cost.
Average fixed cost (AFC): Fixed cost (FC) is the cost, which is constant for the firm irrespective of the output produced by the firm. So the AFC is a fixed cost per unit produced by the firm. It refers to the total fixed cost divided by the output.
Here,
- AFC is the average fixed cost
- TFC is the total fixed cost
- Q is the quantity of output.
Average variable cost (AVC): This is not a constant cost for the firm, it changes with a change in output. Therefore, the AVC is a per unit cost of that variable input. It is calculated as follows:
Here,
- AVC is the average variable cost
- TFC is the total fixed cost
- Q is the quantity of output.
Marginal Cost (MC): It refers to the rate by which the total cost of the produced good changes when the production increases by a single unit. As the fixed cost is constant irrespective of production, so the marginal cost depends on the variable cost only in the short run. Marginal cost is calculated as follows:
Here,
is the marginal cost. 
is the change in total cost 
is the change in quantity.
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