Question 315913: Phillip charged $400 worth of goods on his credit card. On the first bill, he was not charged any interest, and he made a payment of $20. He then charged another $18 worth of goods. On his second bill a month later, he was charged 2% interest on his entire unpaid balance. How much interest was Phillip charged on his second bill?
i cant figure out how to do this problem please help? Answer by rfer(12662) (Show Source):