Answer: $1,329.40
Step-by-step explanation:
First convert the annual interest rate which is compounded quarterly to an effective rate per period.
effective rate = (1 + annual rate/ no of compounding periods) ^ (number of compounding periods/ no. of periods) - 1
= (1 + 8.5%/4) ⁴ ⁺ ¹² - 1
= 0.703%
The monthly payments are constant so this is an Annuity.
Present value of Annuity = Annuity * (1 - ( 1 + r) ^ -n) / r
54,000 = Annuity * ( 1 - (1 + 0.703%)⁻⁴⁸) / 0.703%
54,000 = Annuity * 40.6205
Annuity = 54,000 / 40.62
Annuity = $1,329.40