The $320 acceptance fee or its deferral is specific to the term for which you accept your offer of admission.
If paid in full, $250 is applied toward the New Student Programs/Matriculation fee.
The remaining $70 is an advance payment on your university bill or your $25 housing application fee and $45 housing prepayment.
When you select to accept your offer of admission with fee deferral, you are deferring payment of those fees until your first university bill. Your first bill will show this as only the $250 New Student Programs/Matriculation fee and a $25 housing application fee (if applicable).