The dealer should match the cheaper "invoice" price. MSRP is the price you will see on the window sticker.
Contact the Ford website and ask them for some brochures. You might get one with a $750 private cash offer.
Honestly, you might want to speial order the vehicle you want. Most of the vehicles on the lot are stripped models or have options you don't really want. Most special orders are filled within 60 days or less. Oder it now, you should have it by mid Feb. You can lock in current incentives and if they go up when you actually take delivery, you can get the better of the incentives.
The Fusion I special ordered on 30 Sept and took deliver on 30 Nov (could have taken delivery a week earlier but had to be out of town) had a list of $28,140 msrp and $26,601 invoice. After $3,500 incentives, document fees $159, taxes ~ $750, title $17, advertising and gas ~ $450 were added or subtracted, with 0% down, the total I financed was approx $23610.00