The barcode is converted by the scanner into electrical pulses.the price and the description of the product are sent by the branch computer to the EPOS till. the barcode is read by the scanner. the sale of the product is recorded by the branch computer. the item and price are shown( iили showed) by the till. the item is scanned by the checkout operator. the pulses are sent by the scanner to the branch computer. the item is printed by the till on thepaper receipt.the stock file for product matching the barcode EAN is searched by the branch computer.