Your class should adjust the amount reported by getTotal for preferred customers. For example, if the total would have been $80 but a preferred customer is getting $20 in discounts, then getTotal should report the total as $60 for that customer. You should also keep track of how many items a customer is getting a non-zero discount for and the overall discount, both as a total amount and as a percentage of the original bill. Include the extra methods below that allow a client to ask about the discount: