well, if I am saving supermarket money on shopkeepers then supermarket also needs to expect I will also try to save some money on "mistakes" while using self ch

well, if I am saving supermarket money on shopkeepers then supermarket also needs to expect I will also try to save some money on "mistakes" while using self checkout, two can play this game, especially considering how much money shopkeepers scammed me, because they always make "mistake" which is beneficial only to shop (OK, to be fair, not always, "only" in 95-98% cases, I can't even remember how many times they scammed me with wrong price(tag)s or wrong item (it's almost every other or every third purchase, so I check receipt every single time), but I remember very well once in a many years guy made mistake and charged me cheaper bread, that was like winning the lotto)