A method and apparatus provides information to enhance at least one of: a sales, a service and an administrative transaction by communicating with a plurality of applications from a group of applications in accordance with rule information and based on at least two of the received: end user identification information, client identification information and transaction type information. First light source is configured to generate first light beam of first perceived color. Pasty mass is fed from the pre-fill container into the respective cylinder during a suction stroke of a cylinder with the inlet opening open and the outlet opening closed, and pasty mass is fed into the feed line during a pump stroke of a cylinder with the outlet opening open and the inlet opening closed.