Two years ago, you purchased a new car. You financed your car for 60 months (with payments made at the end of the month) with a loan at 6.1% APR. Your monthly payments are $620.16 and you have just made your 24th monthly payment on your car. Assuming that you have made all of the first 24 payments on time, then the outstanding principal balance on your car loan today is closest to:

a. 20,355

b. 31,263

c. 32,001

d. 19,856