A business method prompts users of electronic payment cards and automatically adjusts automobile fuel pricing based upon the number of passengers in a vehicle at a refueling station. When the driver stops to refuel the vehicle, the system prompts the driver to insert a payment card to pay for the fuel....http://www.google.com/patents/US6968325?utm_source=gb-gplus-sharePatent US6968325 - System and method for automatically adjusting merchandise pricing at a service-oriented interface terminal based upon the quantity of users present at the terminal
