HELP. Is this a decent price on a new 2015 Nissan Versa S Plus with the option of car and trunk mats ?

$16,054 out the door price and it amounts to $500 below Dealer Invoice. By how fast the sales manager came down the $500 , im left thinking there is still fat left over.
Secondly, if there are any Versa Owners of any year....can you tell me how your car has been for you ? If you have a 2013-2015...are you truly getting 40 mpg on the highway driving lightly ?????
ANy info appreciated. Dave.
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