- How could he have done it?
- 70 pounds a tube.

4 seconds sound clip from the The Third Man (1949) movie soundboard.

You can hear this line at 00:58:16.647 in the Blu-ray version of the movie.

Quote context

[...]

- But we didn't arrest them, as our evidence wasn't complete and it might have spoiled our chances of getting the others.

- I'd like a word with this orderly Harbin.

- So would I.

- Well, bring him in.

- I can't. He disappeared a week ago.

- This is more like a mortuary than police headquarters.

- We have better witnesses. Look here.

- How could he have done it?

- 70 pounds a tube.

- Go back to the hotel, and do keep out of trouble.

- I'll try and fix things with the Austrian police.

- You'll be all right in the hotel but I can't be responsible for you on the streets.

- I'm not asking you to.

- I'm sorry, Martins.

- I'm sorry, too.

[...]