Funny story about it is the studio expected it to flop at the box office.
The movie was originally budgeted at $325,000 ($5 million 2020 USD), which in 1942 was a fortune.
An average house was $3,700, an average car $900, the average wage was 30 cents per hour, bread was 8 cents a 1 lb loaf, steak was 34 cents a lb, gasoline was 19 cents a gallon.
Then the budget soared to over $650,000 ($10.19 million 2020 USD) and by the time the film was completed, it was $1,039,000 ($16.29 million 2020 USD).
The final scene between Bergman and Bogart is still unmatched in Movie history.