Oh, I don't think that's going to be enough. I better give you...
5 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.
You can hear this line at 00:49:17 in the Blu-ray version of the movie.
Quote context
[...]
- Now we'll take some at my store.
- Thank you, Mr. Macy. Ooh! That's very kind of you.
- I didn't think you were that generous. That's a bit of money. What are you going to do with it?
- Well, I have a friend-a doctor. He's been very kind to me. He needs an X-ray machine.
- Oh, I don't think that's going to be enough. I better give you...
- I'll make up the difference.
- Buy it through the store and get 10 percent discount.
[...]