
Hannah H. answered 04/21/21
Previous University Finance Tutor
SInce the APR is 4.9%, you have to adjust it to represent that more frequent compounding. You will also need to adjust your N to reflect more frequent compounding.
N = 216 (18 years x 12 months per year)
Rate= about 0.4083333333333333 per month (.049/12).
PV = 0
FV = 30,000
You can solve in excel by using the pmt formula (=pmt)
You can solve on a financial calculator by using the financial function keys and using the number's from above.
You can also solve by using the annuity formula.
I got $86.80 per month