2. A store gives a 15% discount to customers who are at least 55 years old, and a 10% discount to all other customers. Using only the instructions shown in Figure 1-9, write an algorithm that displays the amount of money a customer owes. Be sure to indent the instructions appropriately. (The answers to TRY THIS Exercises are located at the end of the chapter.) TRYTHIS calculate the amount due by swotracting the discount from the sales amount calculate the discount by multiplying the sales amoant by 10% calculate the discount by multiplying the sales amount by 15% display the amount due else end if enter the customer's age and the sales amount if (the customer's age is less than 55) Figure 1-9