The Importance of Self Check Out in a Supermarket

I've never seen such a thing where someone goes to the self check out. I swear she had at least 40 items in her trolley and she was very slow. There's something about this that invalidates everything you've ever told me about your supermarket use. And secondly, I feel like you're also in a supermarket in an alternate universe. Like who's going to the self Checkout with a tr...