Patent ID: 8916783

Claim:
A POS system, comprising; an input unit for receiving an input of an order which includes ordered items that are classified into a main item, a side item, a set item of a combination of a main item and a side item, and an included item which is specified by a side item included in the set item and which is distinguished from the main item, the side item, and the set item; a memory unit for storing item information containing an individual theoretical weight of each item; a calculating section for calculating, based on input information containing item types and item quantities of ordered items input with the input means and on the item information, a theoretical total weight of the ordered items; a weight measuring unit for measuring an actual total weight of the ordered items, which are put in a bag; a judging section for comparing the theoretical total weight and the actual total weight, and when a weight difference there between exceeds a predetermined value and is lower than another predetermined value, identifying one or more of said side item and said included item close in weight to the weight difference from among a set of one or more side items and/or included items included in the ordered items; an output unit for outputting the side item and/or included item identified by the judging section, as an item candidate corresponding to the weight difference, along with a quantity of each item; and an information generating section operable, in response to an order, to generate order in response to an order, to generate order information concerned with one or more of the side item and the included item included in the order, by individually making the one or more of the side item and the included item correspond to an item name, a quantity, and an individual theoretical weight, by detecting whether or not the one or more of the side item and the included item include the same item names, and by obtaining the order information which is representative of a quantity corresponding to the item names by summing up an individual quantity of an individual item included in the one or more of the side item and the included item when the one or more of the side item and the included item include the same item names; wherein: the predetermined value is set to a value smaller than the weight of the item having the smallest weight of the side items and included items, and said another predetermined value is set to a value smaller than the weight of the main item; the judging section identifies, based on the weight difference and the order information, the item name close in weight to the weight difference from among the ordered items; and the output unit outputs as an item candidate corresponding to the weight difference, along with item name and a quantity of each item.