A method of providing multiple level, price-per-unit (PPU) discounts on gasoline to a customer who purchases at least one cross-marketed product at a point of sale (POS) checkout. The customer is awarded a first PPU discount on the gasoline based on a purchase by the customer of a first cross-marketed...http://www.google.de/patents/US6885996?utm_source=gb-gplus-sharePatent US6885996 - Method of providing price-per-unit discounts for fuel to a customer
