I recall that the day that "Death on the Nile" was launched in the U.S., the box office receipts totalled over $4,500,000. That was a new record at that time
However, it now palls into insignificance. I can vouch that "Murder on the Orient Express" was very profitable
The difficulty is in getting any film company to declare profits as compared with box office receipts. Another conundrum is that for example, receipts from films like Carol Reed's "The Third Man" are still coming in.