A mail order house sells five different products whose retail products are:product 1:R2.98, product 2:R4.50, product 3:R9.98,product4:R4.49 and product5:R6.87.Write a C++ program that reads a series of pairs of numbers as follows:a) product number b)quantity sold.Your program should use a switch statement to determine the retail price for each product. Your program should calculate and display the total retail value of all products sold.Use a sentinel-controlled loop to determine when the program should stop looping and display the final results.The output should display the total retail value as a fixed-point value with a decimal point and with two digits of precision to the right of the period.