Abstract: A system for accounting an item sold by weight according to the present invention detects the weight of the item sold by weight taken in a package, calculates the sales price for the item sold by weight taken in the package based on the detected weight, and writes information on the detected weight and information on the calculated sales price in a recording unit provided on a tray for holding the package and from which data can be read and in which data can be written. Then, the system checks whether an unjust purchase is done for the item sold by weight before the system makes accounts square for the item sold by weight or before the system starts selling the item sold by weight by measuring the weight of the tray and checking whether the weight of the tray identified by the recorded information of the recording unit and the measured weight match or not.

Abstract: A barcode scanner that is capable of automatically preventing misreading in scanning the barcodes of the same item for checkout at a cahier register using a stationary-type barcode scanner is provided, by including a merchandise identification information reading unit optically reading merchandise identification information for identifying an item, a merchandise identification information registration unit registering merchandise identification information read in a point-of-sale information management apparatus; and a control unit controlling the merchandise identification information registration unit such that when a number of an item is input by an item number input unit for inputting a number of the item and several pieces of the same merchandise identification information are consecutively read, registration of the consecutively read merchandise identification is not performed for a number of times, the number of times being obtained by subtracting 1 from the number of the item.

Abstract: The present invention is constructed to comprise a second storage unit which can store second progress state information that is formed by registering work progress information indicating work progress performed to the plurality of work subjects in association with each work subject; a reading unit which can read the first progress state information stored in said first storage unit of said electronic tag; a comparing unit which compares the second progress state information stored in said second storage unit and the first progress state information read by said reading unit; and an updating unit which updates the first progress state information and the second progress state information based on the comparison result obtained by the comparison unit. As a result, when multiple operators perform work to multiple work subject, operators can perform work efficiently, and an occurrence of multiplex work can also be prevented.

Abstract: A system for accounting an item sold by weight according to the present invention detects the weight of the item sold by weight taken in a package, calculates the sales price for the item sold by weight taken in the package based on the detected weight, and writes information on the detected weight and information on the calculated sales price in a recording unit provided on a tray for holding the package and from which data can be read and in which data can be written. Then, the system checks whether an unjust purchase is done for the item sold by weight before the system makes accounts square for the item sold by weight or before the system starts selling the item sold by weight by measuring the weight of the tray and checking whether the weight of the tray identified by the recorded information of the recording unit and the measured weight match or not.