100 over invoice turns into 1000?

Santent

My dealer originally told me that he would give me any Z with any add ons for 100 over invoice. After speaking with him on the phone today he tells me he has located the exact Z to my specifications, its 450 miles away.. and he is going to have to go up to 300 over invoice to help pay for the cars trip to the dealership in my town. So, this is what the Z has:

Touring, Automatic Pearl White 370z /w Sports package,
Illuminted kick plates, Front and Trunk mats and the painted splash guards.

Total invoice price= 36,191 (excluding destination fee).
Total price dealer told me on phone= 37,700

Now here is my questions. Im guessing he added in the destination fee in his total price which would bring it to 36,911....then if you add the +300 over invoice it = 37,211. Where is this extra 500 coming from, just trying to make extra money???

Can he charge me extra money to ship it from a dealership along with the original destination charge from the factory? Also.. how do I go about telling him "hey, you said 100 over invoice.. that should be 36,291... not 37,500".

Also, should i push to try to get it even lower than 100 over invoice or am I trying to be too big of a meanie? I mean this guy has to feed his family lol.

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Tickets are on sale for the QQ train, im in first class, where's your a$$?