More grocery shopping

Went to Piotr i Pawel to buy groceries. I had some bananas among other groceries that I took to the cashier's. The lady got a little upset when she looked at the bag of bananas and started saying something in Polish that I didn't understand. Apparently, I should have taken the bananas to a weighing counter where they put the barcoded sticker of the weight and price on the bag. The lady was nice enough to do that for me. Now I know what to do with fresh produce before taking it to the chashier.