Janelle has asked her friend Danny to drive her to the airport, which is a 60-mile, two-hour round trip, so that she can save the $20 cost of the shuttle bus. Danny will have to miss his personal finance class in order to take her there. If Janelle is willing to pay Danny for this service, should Danny charge her more or less than the cost of the shuttle bus, taking into account his opportunity costs in addition to the price of gas?