Bestbuy macbook student discount

So I bought a macbook air today from bestbuy but their “sheerid” program failed to identify me as a student. I have 15 days to prove to them that I am a student with either a class schedule, official letter from the college, transcript, tuition receipt, or student Id card. The official letter from college seems easiest but it’s vague. Does an acceptance letter qualify, or is there a special document ucr hasn’t sent yet?