Here is how X and A plan pricing is calculated, so anyone can make an accurate comparison:
X plan = Dealer Invoice - (0.4% Dealer Invoice) + $275 administrative fee.
Easiest way to calculate X plan pricing is to total Dealer Invoice, multiply that by 0.996, add $275.
X plan "invoice" also includes any regional advertising fees charged to the dealer. These are legitimate charges and are simply passed through to the customer.
X plan sets the maximum limit on document fees (doc fees) to $75, but do check if your state/local law sets a lower maximum. The maximum dealer doc fee under X plan is whichever is less: $75 or your state/local law's maximum.
A plan is dealer invoice - advertising - holdback ( I believe currently 3% of msrp) + $275.00 administrative fee.
Limits on Dealer Documentation fees are the same as X plan.
Of course, any applicable rebates can be applied to either plan, but most bonus offers like the $500 or $750 coupon you may receive in a mailer cannot be combined with AXZD plans.
I sell cars, but not Ford products, but hopefully this clarifies things for you.
'14 Mustang V6 Prem. Perf. Pkg