For the future worth of money that is growing with a simple interest, we have the equation,
F = P + Prn
where F is the future worth, P is the principal amount, r is the decimal equivalent of the rate, and n is the number of years. Substituting the known values,
F = 1500 + 1500(0.118)(2) = 1854
Since, the payment is to be made monthly and there are 12 months per year, the monthly payment should be,
monthly payment = 1854 / 24 = $77.25.