Season 3, Episode 3: "The Pen"

So, that's $17.10, and the tax and the tip.

All right, make it 20 bucks.

It's $19.45, Morty.

See, you know your father.

You got to get it right to the penny.

But that's why he was such a good president.

Hey, what kind of pen is that?

-This pen? -Yeah.