An online retailer sells five different products with the following retail prices: Product Number | Retail Price —————|————- 1 | $x.xx 2 | $x.xx 3 | $x.xx 4 | $x.xx 5 | $x.xx Write a program that: a) Reads a series of pairs of numbers in the following format: 1. Product number 2. Quantity sold (positive value) b) Keeps asking the user for values until the user enters 0 as the product number. c) Calculates a