A market trader in a bazaar sells souvenirs to foreign tourists who visit the place on day trips and, after bargaining wiThthem, sells at the highest price that she thinks she can get from each...

A market trader in a bazaar sells souvenirs to foreign tourists who visit the place on day trips and, after bargaining wiThthem, sells at the highest price that she thinks she can get from each visitor as long as the production costs of the souvenir are covered. Explain why this method can give a better profit than charging everyone a fixed price.