Hi!
From what I know, the answer is: $5,503.
I got that answer by first multiplying 40 to 12.50, which was 500, then added .05% to 500, which ended up being 500.25. Then multiplied 500.25 with 12 (because there's 12 months in a year.) which was 6,003. I then subtracted 500 (because she opened it with 500) from 6,003 which was, the answer, $5,003.
Hope this helps! Sorry if its wrong, I was seriously racking my brain trying to get you this answer lol.