You won't know how much it is going to cost though. Have your money out, but you don't have to have your payment ready down to the last cent.
That is pretty much what I meant
Oh. You should have made that more clear. The way you worded it made it sound like you should have the exact payment ready when you get to the cashier.
It was the simplest way of wording it. I'm sorry it wasn't clear in the beginning.