Most of the shopping malls already implemented barcode scanner when come to cashier counter. Nowadays not only big shopping malls will use barcode system, you can actually see many shops start using it too. This system very useful for them because save time on counting money as well as come to stock take during month end or year end. We can summarized the stock count at a glance easily too. Unlike olden days where people have to use manual counting that might be inaccurate!