Calculate the lease expenses for an operational lease if: vendor offers an operating lease for $15,284.62 per month, including $9,661.84 maintenance fee. The term is variable from 3-7 years, although you must pay a $25,000 installation and de-installation fee. If you keep the asset for 7 years, you can purchase it at fair market value (estimated to be $350,000) at the end of the lease.