The $1500 in untaxed incentive is for VPP. If you don’t have it remove that from the calculator link.
The 1K extra for NY metro area is included in the sales price so if you are out of area, your sales price goes up by 1K.
Infiniti deals with incentives in a bit of different way so everything published on edmunds, autobytel or costco car buying programs under incentives is not all the available incentives. There are other hidden dealer only incentives which are unpublished on above sites but need to be applied to get the hackrworthy deals you would usually see on this forum.
The best incentives from what I have see are usually in Southern/Northern CA and NY area so if you can come close to it anywhere else in the country you are doing pretty good in most situations.