Suppose you are walking down a path that splits into three: a red path, a blue path, and a green path. At the end of the red path is $100 cash, at the end of the blue path is $60 cash, and at the end of the green path is $20. You are free to take the cash at the end of whatever path you choose. If you can't go down more than one path, what is the opportunity cost of choosing the green path?

a. $100 b. $60 c. $40 d. $20 e. $0

Imagine you win a free ticket to see an Adele concert. You are the only person that can use the ticket, so it has no resale value. You would be willing to pay as much as $200 to see Adele. Hedley is performing on the same night. Seeing Hedley is your next best alternative to seeing Adele. Tickets to see Hedley cost $80. On any given day, you would be willing to pay as much as $150 to see Hedley. Assume there are no other costs of seeing either performer. Based on this information, what is your opportunity cost of seeing Adele?

a. $0 b. $70 c. $80 d. $150 e. $200