刚收到预科OFFER有个地方不太明白求翻译！！！

Please complete and return the Acceptance Declaration/Payment Advice form to XXX College within 30 days of the date this offer was made.Students receiving an XXX College Offer of Admission made within 30 days before course commencement have 7 days to accept and make payment. 这段话的意思是我应该在收到OFFER 30天之内交acceptance declaration 然后几天之内交学费呢？？