05. Orders

using System;

namespace Orders
{
    class Program
    {
        static void Main(string[] args)
        {
            string product = Console.ReadLine();
            int volume = int.Parse(Console.ReadLine());
            double sum = 0;

            if (product == "coffee")
            {
                sum = 1.5;
                Coffee(volume, sum);
            }
            else if (product == "water")
            {
                sum = 1;
                Water(volume, sum);
            }
            else if (product == "coke")
            {
                sum = 1.4;
                Coke(volume, sum);
            }
            else if (product == "snacks")
            {
                sum = 2;
                Snacks(volume, sum);
            }

        }

        static void Snacks(int volume, double sum)
        {
            sum  *= volume;
            Console.WriteLine($"{sum:F2}");
        }

        static void Coke(int volume, double sum)
        {
            sum *= volume;
            Console.WriteLine($"{sum:F2}");
        }

        static void Water(int volume, double sum)
        {
            sum *= volume;
            Console.WriteLine($"{sum:F2}");
        }

        static void Coffee(int volume, double sum)
        {
            sum *= volume;
            Console.WriteLine($"{sum:F2}");
        }
    }
}