[meford4u]

Don't know off hand Steve, but I can get you a pin number when the time come closer and you can find out for yourself. It's usually around 9-13% for A plan and 5-7% for X plan. Your a friends and family or X plan buddy.
There is no set rule of thumb for savings. Trucks always save more because there are alot of profit in the sale of the truck. And the more stuff you add, the bigger the discount.
On a $35k Mustang I would guess $5k off then whatever Ford is discounting the car at the time plus for you as a returning customer another $1000 off and as a Costco member another $1000 off and if you have a pink poodle another $500 off.