Department Store Cart

I went to a department store today. As I left, I noticed they had these carts. I usually go out another door so I had never seen them before. Maybe they were new, I'm not sure. These are to carry all your bags and packages of things you have already bought. I guess. I can't imagine that they are shopping carts for you to load up and take to the register. How much stuff would you buy in one visit at a department store? Besides, many clerks are around to help carry things to the register for you.