Answer 10a
I disagree with Marcie's friend. The $80 lost on the macroeconomics book cannot be recovered , neither should it be recovered on forgoing the opportunity to study microeconomics. What Marcie should do is invest in a Microeconomics book and study her subject. Studying the Macroeconomics book is futile.
Answer 10 b
Sunk cost is any cost that cannot be recovered back. Here Peter paid $180 Intermediate Economics course textbook. And it is also mentioned he can recover only $70 on selling the book in the internet. Thus his sunk cost is $180-$70=$110.
Answer the following questions. a. Marcielis enrolled in a Principles of Mieroeconomics class but mistakenly buys...