List at least FOUR reasons that you professor is IN LOVE with his credit card!

If a credit card holder pays her balance in full by the due date each month how does the credit card issuer make money?

A has a credit card balance of $$3000$ at the beginning of the month. He pays $$1500$ on the $10$th and makes no additional charges. Assuming a $30$ day month and a $12\%$ annual interest rate what would be the interest charge for the month?

$4.$ Name at least FIVE ways the CARD Act of $2009$ protects consumers from predatory lending practices.