I need help , we cant use excel I want to learn how to do it with the calculator old fashion way . what formula can i use?

Financing a Car (5-6) Melissa purchased a new car. The car had a list price of $20,540. Melissa made a down payment of $3,900 and financed the rest, paying 8.6% interest compounded monthly over a payment period of 5 years. If Melissa also had to pay 8.25% sales tax, a $995 vehicle registration fee, and a $57 documentation fee, what is her monthly payment