There are many reason... including advertising (the shop might have their logo on the side of the packaging) - or privacy (customers might not want other people to know what they've bought.
Were roman shopkeepers educated Were roman shopkeepers educated
the Mesopotamian shopkeepers took care of their own shops
Shopkeepers should not overcharge.You can't overcharge a battery.
You owe the shopkeepers money, simple as that.
they use it so they can keep track of how much money they have got and how many products have been bought.
To keep track of sales and how much they earn in a day and how much sock they sell.
no
Some smaller shopkeepers may not actually need to use a spreadsheet. A spreadsheet is only as good as the information entered into it.
They sold stuff
yes
the packaging use for drinking water
Shopkeepers typically scan barcodes using handheld barcode scanners or point-of-sale (POS) systems equipped with built-in scanners. These devices use laser or imaging technology to read the barcode and quickly retrieve product information, prices, and inventory data. Some shopkeepers also use mobile devices or tablets with barcode scanning apps to streamline the checkout process. This technology helps improve efficiency and accuracy in retail operations.