意料之中-斯蒂文斯理工

有这么一段文字：

Once again, congratulations on your admission to Stevens Institute of Technology! Please note that we do require a $500 deposit to hold your seat in the incoming class which will be applied as a credit toward your first tuition bill. This deposit is non-refundable. We request that your deposit is received within 45-days of the offer of admission. Should you need to request a deposit extension, please contact us via email (1point3acres.com). If payment or extension has not been received by February/16/2013, then your admission may be suspended.

是说不想2-16就交钱的话就发邮件要求延期答复吗？有延期成功的同学吗？延期的理由怎么写呢？谢谢！

求加大米，新人没有米。