Cassandra purchased a new car. the car had a list price of $16,870. cassandra made a down payment of $1,800 and financed the rest, paying 12.3% interest compounded monthly over a payment period of four years. if cassandra also had to pay 7.8% sales tax, a $895 vehicle registration fee, and a $68 documentation fee, what is her monthly payment?
b. 459.42 is the correct answer

Why give out the answer?  Instead, please show your work, so that others could give you appropriate feedback.
Add together all the initial expenses:  the cost of the car, the sales tax on that amount, the vehicle reg fee and the doc. fee.  Subtract the $1,800 down payment from this sum.  The result is the amount financed.  What formula will you use to determine the monthly payments on the amount financed?