box office
US /ˈbɑːks ˌɔː.fɪs/
UK /ˈbɑːks ˌɔː.fɪs/

1.
the place in a theater or other arts venue where tickets are sold
:
•
I bought my tickets at the box office.
•
The box office opens an hour before the show.
2.
the amount of money taken by a movie, play, or concert
:
•
The new movie had a huge box office success.
•
Despite mixed reviews, the play's box office numbers were impressive.