Answer:
B) $90.
Explanation:
Opportunity cost is expressed as the value of the forfeited next best alternative. The opportunity cost of attending the U2 concert will be the value of the missed benefits, equivalent to the cost of attending the show. The total amount associated with attending the U2 concert represents the opportunity cost. The reason being that the amount could have been used for other purposes.
The cost of attending the concert will be as follows.
The opportunity cost of bob Dylan's cost is the value placed on the ticket, which is $40. Since you sold the ticket is sold for $10; the opportunity cost reduces to $30.
The coast associated with the U2 concert will be $60+$30= $90, and it will be the opportunity cost of attending the concert.