 These kids don't know basic math. They don't know it like we know it. They teach these kids all kind of weird stuff to do math. I remember I was telling my son, it's nothing against my son because I'm his dad and I'll make it right. I would say, son, here's the bill. Give him 20% tip. And I don't know if he came up with the 20% or whatever, and I just walked him through it. He put the 20% and I add that up.