It's a little confusing.
At the time, there was a $1500 rebate if you purchased it. Therefore, my "offer" was:
$ 31,905
$- 1,500
--------
$ 30,405
$-13,000 (trade in value)
--------
$ 17,405
$ 11,500 (what I owed on the trade in)
--------
$ 28,905
Since I leased, the $1500 rebate was not valid. The dealer did add $1000 to my trade in value, so I leased $29,405 - residue.
Told you it was confusing.