A system for selecting a candidate information unit for linking to a given information unit based on the content of the given information unit. The pouch area, formed by cinching and locking the cord, is bounded with an extended skirt that drapes down over the mechanical action of the gun. In order to prevent the development of germs in the residues of the rinsing agents, comprising diluted residues of laundry treatment agents, when remaining in the fluid lines for a longer period of time, exemplary embodiments of the invention provide for the metering line to be flushed immediately before adding a dose. Circulation between the fluid source and the dispense cartridge is maintained. Three-dimensional characteristics are imbued to the selected device. The single solenoid moves a forked electromagnet secured thereto to operate a selector card having a magnet held therein to bias between the collect and refund sides of a hopper in the coin escrow assembly, without the need for complex and expensive electronic circuitry.