To facilitate handling and to save slip paper by displaying the selected low-order sales information, at the time of selecting sorting by the time element, by sorting by the selected element time so as to speedily and easily finding and analyzing a specifical value while narrowing sales information.

Through the use of a keyboard and a touch panel on a screen, optional high-order sales information is selected from a high-order sales information group to select one of the low order class (section). Among the group of low-order sales information belonging to a selected low-order side class, low-order sales information group belonging to a high-order class selected in high-order class (group) is preferentially displayed on a screen 37B. Optional one low-order sales information is selected from the low-order sales information group displayed preferentially and a time element class (by time segment, e.g.) is selected by using a touch switch (time segment) 37T in addition, a display lamp 37T is lighted. Thereby, a selected low-order sales information is displayed on the screen 37c of a sort by the selective time element (time segment).