My dear sir! I agree that in business it's often a good thing to pretend to be stupid, but really, I think you're carrying it a little far.
12 seconds sound clip from the Mr. Topaze (1961) movie soundboard.
You can hear this line at 01:05:24 in the Blu-ray version of the movie.
Quote context
[...]
- Oh! That's a good one. That is a good one.
- Just between ourselves, how much are you getting out of it?
- That was a rude and untimely remark.
- It would do well if you were to reflect a little before speaking.
- Would you please leave the room.
[...]