Order Calculator

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter the product you want: ");
            string product = Console.ReadLine();
            Console.Write("Enter the quantity you want: ");
            int quantity = int.Parse(Console.ReadLine());
            Console.WriteLine("The price is: {0:F2}",Order(product,quantity));

        }

        static double Order(string product,int quantity)
        {
            double sum = 0;
            double coffeePrice = 1.5;
            double waterPrice = 1;
            double cokePrice = 1.4;
            double snacksPrice = 2;

            switch (product)
            {
                case "coffee":
                    sum = coffeePrice * quantity;
                    break;
                case "water":
                    sum = waterPrice * quantity;
                    break;
                case "coke":
                    sum = cokePrice * quantity;
                    break;
                case "snacks":
                    sum = snacksPrice * quantity;
                    break;
                default:
                    sum = 0;
                    break;
            }

            return sum;
        }

    }
}