What is the total finance charge for a $4,250 loan at 13.25% interest compounded monthly for 24 months

First we need to calculate the monthly payment to repay the loan using the formula of the present value of an annuity ordinary which is
Pv=pmt [(1-(1+r/k)^(-n))÷(r/k)]
PV the amount of the loan 4250
PMT monthly payment?
R interest rate 0.1325
K compounded monthly 12
N time 24 months
Solve the formula for PMT to get
PMT=pv÷ [(1-(1+r/k)^(-n))÷(r/k)]
PMT=4,250÷((1−(1+0.1325÷12)^(−24))÷(0.1325÷12))=202.55

Now to find the total finance charge use the formula of
Total finance charge=monthly payment×number of months-the amount of the loan
Total finance charge=
202.55×24−4,250=611.2

So the answer is 611.2

Hope it helps!