Finance manager mentioned the following info from Edmunds.
It mentions that it will cost me around $1200 for 3 years.
https://www.edmunds.com/nissan/leaf/2018/cost-to-own/
I leased a 2019 Leaf recently.
I got into prepaid maintenance ($680) and excess wear & tear protection ($888) after sales manager's recommendation.
I do have 60 days to cancel these if needed.
As expected, many people here mentioned that this might not worth it in some discussions few years...