In various embodiments, a method may include receiving an indication of a price of an item to be purchased by a person from a merchant, receiving an indication of an amount tendered by the person, determining an amount of change due to the person based on the price and based on the amount tendered, receiving...http://www.google.co.uk/patents/US8062116?utm_source=gb-gplus-sharePatent US8062116 - Gaming at cash register
