2017 glc 300 4 matic

looking to lease in bethesda md

a msrp 49,910 MSRP
giving me a buy price of 46.410

and said payment with all fees and tax $774
I obviously left the dealer bc that is a horrible deal i know

I was told the residual is 59% but, what is the money factor ?

36 months 12,000 ( although i think i have read that 39 months is best deal)