The formula to calculate the total amount paid on a loan with compounding interest is:
A = P(1 + r/n)^(nt)
Where:
A = the total amount paid
P = the principal amount of the loan
r = the annual interest rate (expressed as a decimal)
n = the number of times the interest is compounded per year
t = the number of years the loan is taken out for
In this case:
A = 15000(1 + 0.035/12)^(12*5)
By using calculator or formula A=P(1+r/n)^(nt) we can find the total amount Caden will pay over the course of the loan is $18,097.11.