I should point out that the reason I normally dislike open ended arthouse flicks is that most of 'em leave an open end 'cuz the screenwriter, usually the director as well, is just too damned lazy to do the job. So we get an artsy-fartsy excuse for an ending, and something to argue about over espresso afterwards. Coppola makes no excuses here. We know the girls are going to die, and they do. The exact reasons why are the mystery.
Discussion is inevitable.
On average, a first run movie ticket will run you Eight Bucks. That's well above average for films on the arthouse circuit. Used by permission. Not to be used or copied for any commercial purpose.