Living in country where you add bar code to items like that yourself when you pick them up, these problems always feel strange. As with produce you have a sign

Living in country where you add bar code to items like that yourself when you pick them up, these problems always feel strange. As with produce you have a sign of price and number there. You put items in plastic bag or not, then go to scale put item there and press button. Prints out barcode. Solves the whole remembering which item thing. For multiple items, there is separate bar code on larger packaging. Ofc, this does not solve the issue of some large number of individual items...