Regarding the plastic bags, I guess that the supermarket owners should do something about it too. Billa is not Bulgarian supermarket. Billa is a European supermarket chain operating in numerous countries, originating in Austria. I think that "fashion" with the plastic bags came from outside of Bulgaria.  

I am 29 years old and still remember the time when we were going to the store with textile carry bags. I am sure that Bulgarians can easily get used to another way of packaging.

How do you pack carrots and a kilo of oranges in US?