You are trying to decide whether to purchase the latest Harry Potter book online or borrow it from the library. There is no charge for borrowing a book from the library, but going to the library takes more time than ordering a book online. Regardless of how you get the book, its benefit to you is the same. If the cost of buying the book online is $13, then you should:
A. borrow the book from the library if the cost of doing so (in terms of the extra time it takes) is greater than $13.
B. borrow the book from the library if the cost of doing so (in terms of the extra time it takes) is less than $13.
C. borrow the book from the library because you can get it from the library for free.
D. buy the book online because it takes less time.
Answer: B
Economics
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