Okay I'm assuming you received the private mail offer as that is currently the only incentive showing on the Vincent for 2012 Focus?
If that is the case:
Based on my zip code here you cannot combine offers, it's either
A. $500 FMC plus rate & Private mail offer (ranging between $200 & $750).
B. $500 FMC plus rate & College student purchase program.
You don't have to take delivery but you must contract and have it submitted through Ford's system by expiration date. Therefore if your Focus is 10 days out and it's May 2nd then I would contract and then just take delivery when it shows up.