Question about payment for summer school

I was accepted to a summer school that is not my first choice. and I am still waiting for other responses. If I accepted the offer and pay partial amount of the tuition fee but decided to withdraw later (before the due date of the full payment), will I get into trouble?

What do the Terms and Conditions say about refunds?

They only refund tuition fee, but not the residential fee, which is several thousand dollars. I think that is too much.