using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Which burger do you want? (chicken $7.50, beef $8.50, veggie $7.75)");

        string burger = Console.ReadLine();

        double bprice = 0.0;

        switch(burger){

            case "chicken":

                bprice = 7.50;

                break;

            case "beef":

                bprice = 8.50;

                break;

            case "veggie":

                bprice = 7.75;

                break;

            default:

                Console.WriteLine("Invalid");

                bprice = 0.0;

                break;

        }

        Console.WriteLine("Would you like a beverage? (yes/no)");

        string beverage = Console.ReadLine();

        double bevprice;

        switch(beverage){

            case "yes":

                Console.WriteLine("What size would you like? (small $1.50, medium $2.00, large $2.25)");

                string size = Console.ReadLine();

                if(size == "small"){

                    bevprice = 1.50;

                    break;

                }else if(size == "medium"){

                    bevprice = 2.00;

                    break;

                }else if(size == "large"){

                    bevprice = 2.25;

                    break;

                } else {

                    Console.WriteLine("Invalid");

                    break;

                }

            case "no":

                bevprice = 0.0;

                break;

            default:

                Console.WriteLine("Invalid");

                bevprice = 0.0;

                break;

        }

    }

}