Actually production budget was 44 million, and it’s doing fine. Quentin’s movies don’t generally blow up the box office. And it’s a fine movie, if you’re into that goofy Quentin stuff. He has a pre-selected audience. If this movie is having a problem it’s that it doesn’t have a lot of appeal to the black audience, and that’s usually one of his bigger demos.
You also have to include the promotional budget to get the real cost. And keep in mind that studios in general only get half the box office, the rest being kept by the theaters. So a film must do at least double it's total cost to make a "profit". I put profit in quotes because due to Hollywood accounting all films lose money.