[Fanta]

I will calculate in this way.
First ask for the price for a 2016 7 series in lease and financing and then
ask for price for 2014 7 series in lease and financing with 20K discount.
You will have residual value for the 2 cars and then you can work the way
out backwardly. Keep the car monthly payment the same and minus the
extra loss per month; multiply as a X years extra loss and add extra loss in residual value.