Wasn't it mentioned though in the book (twilight anyways) that she had a savings account? so really, that could have been where she got the computer from as well as the cell phone.
Yeah- but even so. It's not like Bella to spend all that money on a fancy mac when she could have bought a perfectly fine PC for $500 cheaper.
I suppose I don't mind so much though- The sponsorship dollars allowed the movie to be made.lol.