Abstract: Columns of sales item stock shelves in a drive-through type store are referred to as groups. Indicators are disposed on the columns of the shelves. Each of the indicators is composed of, for example, red and blue lamps. The red or blue lamp lights corresponding to a POS unit from which a store clerk has input a sales item code. The red or blue lamp represents the location of a sales item group that includes an ordered sales item of a customer. The store clerk collects the ordered sales item from the sales item group indicated with the color designated to the POS unit that the store clerk uses. The indicators are controlled by the POS unit. The POS unit searches for a sales item group that includes the ordered sales item corresponding to the input sales item code and causes the indicators to indicate the sales item group.