18. If you had a balance of $600 last month and made your first purchase of $175 on the 7th day of the month, made the 3% minimum payment on the 18th day of the month, and then spent another $400 on the 27th day of the month, how much money would be subject to finance charges If it was a 30 day billing cycle? *

19. In the example above, if the credit card has an APR of 16%, how much is the finance charge for that month? *