According to one embodiment of the disclosed invention, an apparatus determines a current price of a product for sale by the vending machine. It then determines, for the product, a price increment, a predetermined price, and a demand threshold, that are defined by data stored in at least one data table....http://www.google.com/patents/US20050060062?utm_source=gb-gplus-sharePatent US20050060062 - Products and processes for managing the prices of vending machine inventory
