Jerry Allison starts the month with a balance on his credit card of $1,070. On the 10th day of the month, he purchases $390 in clothes with his credit card. On the 15th day of the month, he makes a payment on his credit card of $550. Jerry's interest rate is one and a half percent for the month. Jerry's bank calculates the finance charge on their credit card by using the previous balance method. What would Jerry's finance charges be for the month?
a. $11.17
b. $7.80
c. $13.18
d. $21.90
e. $16.05