Come on, the studio didn't make anywhere near those amounts, and when theater take, currency adjustment, film and distribution expenses, promotion, advertising, etc. are taken into account, I seriously doubt they make more than $100 total, on both movies, in net profit.
If you see a WW box office total, take approximately 55% of it as take-home by the studio, then subtract production budget, advertising budget and distro/film copies, etc.
Probably about $70 million on FF1 and maybe $20 million on FF2 in net take-home profit.
And then that $90 million in real money gets put through the HW accounting machine and it comes out as a massive loss.
At the end of the day, they did well enough in 2005, to spin the wheel in 2007 with the same cast. It was either insanity, or money. I'll give you the redactions for expenses... That said, I guess, why wouldn't they actually attempt to leverage the license to its fullest? That 27% approval number is horrible... And yet they still trudged forward with a 30% higher budget for the second one. Wait five years, rinse / repeat.