I'm afraid I can't tell you that.
4 seconds sound clip from the Rain Man (1988) movie soundboard.
You can hear this line at 00:13:54 in the Blu-ray version of the movie.
Quote context
[...]
- May they remind him of the value of excellence and the possibility of perfection.
- The last part, what does that mean?
- I'm afraid I can't tell you that.
- Who controls the money? You? You control the money?
- What is that? How does that work? How does that work?
- Forgive me, but there's nothing more I can say.
- Now, I'm sorry, son. I can see that you're disappointed.
- Disappointed? Why should I be disappointed? I got rosebushes, didn't I? I got a used car, didn't I?
[...]