The main object of the present invention is to provide a colour filter with a retardation layer, capable of minimizing light leakage even in the case the visual angle is large in the black display state, for a liquid crystal display. The front body has a face portion, a metal sole portion, a metal side portion, a metal crown portion, a metal side portion, and a hosel portion. In a method for computing billing revenues, the non-compliance of the network service provider with contracted requirements for carried load causes a revenue penalty to be exacted for lost bandwidth. If a combination for which agreement is achieved is found in the combined information storage unit, this value is stored in a printing information storage unit and transmitted to the printing device.