He doesn't understand the concept of money.
4 seconds sound clip from the Rain Man (1988) movie soundboard.
You can hear this line at 00:22:08 in the Blu-ray version of the movie.
Quote context
[...]
- What's the point? What's the fuckin' point is why didn't anybody tell me I had a brother?
- What would you have done about it?
- Does he know how much money he's been left?
- No, he doesn't understand the concept of money.
- He doesn't understand the concept of money.
- He's just inherited $3 million, and he doesn't understand the concept of money?
- That is fucking poetic, don't you think?
- Name's yes. Then who's playing first? Yes.
- I mean the fellow's name on first base. Who.
[...]