2. There are three seating categories at a stadium. For a softball game, Class A seats cost $15, Class B seats cost $12 and Class C seats cost $9. Write a Java modular program that asks the user how many tickets for each class of seats (class A class B, class C) were sold, and then calls a void method named calTotalSales that calculates the amount of ticket sales for each class and displays the amount of income generated from each class ticket sales and the total ticket sales