Answer
\$26
Work Step by Step
The marginal cost of staying open includes the \$20 opportunity cost for your time and the $6 cost for another hour of electricity.
The fixed costs are not part of the marginal cost.
Microeconomics: Principles, Applications, and Tools (8th Edition)
by O'Sullivan, Arthur; Sheffrin, Steven; Perez, Stephen
Published by
Prentice Hall
ISBN 10:
0-13294-886-9
ISBN 13:
978-0-13294-886-9
Chapter 2 - The Key Principles of Economics - Exercises - 2.2 The Marginal Principle - Page 45: 2.9a
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