Consider an airline that initially has a single price of $300 for all consumers. At this price, it has 120 business travelers and 90 tourists. The airline's marginal cost is $100. The slope of the business demand curve is -$2 per traveler, and the slope of the tourist demand curve is -$1 per traveler. Does the single-price policy maximize the airline's profit? If not, how should it change its prices?