Sarah started her November 1, 30-day credit card billing period with a balance of $200. She used her credit card to purchase medication costing $75 on November 6^th, paid for car repairs of $600 on November 10^th, and made a small payment of $100 on November 20^th. her annual credit card interest rate is 18%, compounded daily. How much interest will he be charged for the month of December, assuming the average daily balance method is used?

1. $7.86
2. $8.02
3. $9.17
4. $9.55