I heard this question today in a supermarket. It came from a 7 year old boy, who was looking at big boxes filled with candy bags. There was a sign which said: 2 bags for xx Danish kroner, and I took a look in my own shopping cart! Sometimes you only save a ridiculously small amount, so it is more in the interest of the supermarket than in consumer interest. And it is really irritating for people who live in small places. Why don't things just have a price?