WILL GIVE BRAINLIEST!!

4. Eva Truett had an open-end lease for a minivan for her home
decorating business. The lease cost $315 per month for
60 months. She paid a deposit of $1,200, a title fee of $135,
and a license fee of $85. At the end of the lease, she can buy
the van for its residual value of $3,850.

(not answer choices below)
a. What is the total lease cost?
b. What is the total cost if she buys the van?