Accepting admissions from two schools?

Hey there, I was wondering what the case would be if I was thinking about accepting offers from two different schools? I got into a bunch of different schools but I am mostly deciding between UCLA and USC. I want to accept only one admission offer by the June 1st deadline but my FAFSA application was screwed up and I found this out just last week. UCLA has updated how much they are offering me in scholarships and loans but USC has yet to do so and is saying it may take up to another 4 weeks which would be after the deadline. I really want to know how much I am being offered by both schools and weigh out my decision so could I submit to both schools and wait until USC has responded with how much they are expecting me to pay?

No you cannot SIR to both schools, I would however contact USC stating that they are your first choice but cannot accept unless you have your FA package. Maybe they will give you an extension to submit your SIR. In the meantime, accept UCLA until you hear back from USC.