Techniques for supporting communication in a dominant interference scenario are described. When the difference is less than a predetermined value, the motor drive control part drives the motor at a smaller number of revolutions, as compared with a case where the difference is the predetermined value or more. Further embodiments also relate to improved water level sensing, improved water reservoirs, and improved carafe features. Accumulation elements are driver members positionable beneath the conveyor belt’s carrying section surface or above the conveyor belt’s carrying section surface, and a guidance system disposed beneath the driver member path for position driver members in driving position. A level of content relationship between the new information and the information including in the at least one of the tabbed portions is determined. Thus, the number of the bill storage sections can be easily increased or decreased, and bills can be taken in and out of each storage section.