Carl won a ticket to a concert that was

Q7: Carl won a ticket to a concert that was selling for $80. The concert subsequently sells out. What is Carl's opportunity cost of attending the concert if he can sell the ticket for $200? Q8: Deepak paid $30 for a non-refundable ticket to a hockey game. Ticket sales for the game turn out to be low and he can now sell his ticket for only $12. What is Deepak's opportunity cost of attending the game? Q9: Eloina can spend $100 on a pair of shoes today or save the amount of money at an annual interest rate of 5% and spend the resulting amount in 3 years from now. What is Eloina's opportunity cost of spending the $100 today? TL C