Sellers are not polite, all believing people are not happy, they do not want to come in and buy goods from them. What is good is that they punch checks and you can see the price in other stores all the time they give different prices.
Norms, not everything is there, but in general it will go for housekeeping, grandma lives opposite the store, so we only go there, they give bread to pensioners on Fridays for free, so it's a freebie