Heidi and Spencer may need to have Jerry Seinfeld's dad lend them his tip calculator, because they don't know how to calculate gratuity!
The two were out at a restaurant in LA over the weekend with two friends, and ran up a $783 bill. And they only tipped their waiter $16!
Luckily for the waiter, a producer from "The Hills" gave him $60 in cash out of his pocket to make up for it. And even with the extra help, the guy still didn't even make 10%. Isn't it common knowledge by now that you tip 15% at the very least, unless it's the worst service of your life?