2017 X3 lease in Northern CA numbers

I am in North CA, bayarea. Here is the X3 lease details from dealer, it is a little bit different from what I calculate. Please take a look. Especially the MSD part, which is 4200 from dealer, but 3500 from calculator.

BTW, I dont think it is a very good deal, since there is $1500 incentives from corporate and $1000 from blackfriday lease incentive. With that been said, I expect at least 14% off MSRP instead of 11.4% off

Monthly Payment (Excl. Tax): $430
Monthly Payment (incl. tax): $468
Drive Off: $5,476
First month’s payment incl. tax: $468
Down payment: $0
Total MSD payment: $3,500
Registration and doc fee: $492
Tax on cap cost reduction and fees: $91
Acquisition fee: $925
Leasehackr Score: 10.3 years
Disposition Fee: $350
Total Lease Cost: $18,313