Gregory Is Considering Attending a Concert with a Ticket Price

Multiple Choice

Gregory is considering attending a concert with a ticket price of $40.He estimates that the cost of driving to the concert and parking there will add an additional $20.In order to attend the concert,Gregory will have to take time off from his part-time job.He estimates that he will lose 5 hours at work,at a wage of $8 per hour.Gregory's opportunity cost of attending the concert equals

A) $80.
B) $100.
C) $40.
D) $60.
E) $20.