## To calculate November's interest using the average daily balance method, you can follow these steps:

1. Start with the beginning balance of $600.

2. Add any new charges made throughout the month: $80 + $100 + $50 = $230.

3. Subtract any payments or credits made during the month: $200.

4. This will give you the average daily balance for November.

5. Multiply the average daily balance by the APR (Annual Percentage Rate) divided by 12 (to get the monthly rate), which is 16% / 12 = 0.0133.

6. Calculate the interest by multiplying the average daily balance by the monthly rate: Average daily balance x 0.0133.

To calculate the interest using the previous balance method, you would simply multiply the previous balance ($600) by the monthly rate (0.0133).

To calculate the interest using the adjusted balance method, you would subtract any payments or credits made during the month from the previous balance and then multiply the adjusted balance by the monthly rate.

Comparing the three methods, the average daily balance method would result in the highest interest amount, followed by the previous balance method, and finally the adjusted balance method.

Considering that Nancy plans to increase her outstanding balance, the adjusted balance method would be recommended. This method takes into account the payments made during the month, reducing the outstanding balance and ultimately resulting in lower interest charges.