Marginal Analysis in a Holiday Classic

During the weekend, I watched one my holiday traditions, Irving Berlin's White Christmas. About 37 minutes into the film, Bing Crosby and Danny Kaye find themselves on a train from Florida to New York. Danny gave away the tickets and now is trying to get Bing to go to Vermont to meet up with "the Haynes Sisters." What popped in to my mind was "marginal cost/benefit analysis." If you get a chance, watch it and see if you agree.