Electronic cash register

Claim 1

An electronic cash register which registers data on each of commodities to which a bar code including a department code is attached as a source marking at a factory and commodities to which a bar code including a department code and unit price data is attached as an in-­store marking at a shop, comprising: bar code read means for reading said bar codes; first store means for beforehand storing unit price data on each of commodities to which said source marking is attached; second store means for beforehand storing data on a discount of each of commodities to which said in-store marking is attached; and register processing means for reading from said first store means, in accordance with the reading of the bar code of said source marking by said bar code read means, unit price data corresponding to the department code contained in the bar codes and registering the read data, reading from said second store means data on a discount corresponding to the department code in that bar code in accordance with the reading of said bar code of said in-store marking by said bar code read means, and discounting and registering the sum based on the unit price data contained in the bar code on the basis of the d ta on the discount.