A portable calculator for computation and display of transaction values for concessions sales between a vendor and a customer. The resin film under the light reflecting film includes a first region and a second region. When one processor performs a FIFO operation, the processor updates the other processor’s descriptor via a memory access across the bus. The location information can comprise white space sensing information from which a direction of a transmitter relative to a position of the UE can be determined, and pilot signal sensing information from which respective directions of one or more BSs relative to the position of the UE can be determined. If the state is normal, it transmits the feed information by returning it to a line which is a pair with the predetermined line. The method comprises the steps of sequentially selecting a group of the plurality of row electrodes during a selection period, simultaneously selecting the row electrodes comprising the group, and dividing and separating the selection period into a plurality of intervals within one frame period.