public static void Main()
var product = Console.ReadLine().ToLower();
var town = Console.ReadLine().ToLower();
var quantity = double.Parse(Console.ReadLine());
if (product == "cofee") Console.WriteLine(0.50 * quantity);
if (product == "water") Console.WriteLine(0.80 * quantity);
if (product == "beer") Console.WriteLine(1.20 * quantity);
if (product == "sweets") Console.WriteLine(1.45 * quantity);
if (product == "peanuts") Console.WriteLine(1.60 * quantity);
if (product == "cofee") Console.WriteLine(0.40 * quantity);
if (product == "water") Console.WriteLine(0.70 * quantity);
if (product == "beer") Console.WriteLine(1.15 * quantity);
if (product == "sweets") Console.WriteLine(1.30 * quantity);
if (product == "peanuts") Console.WriteLine(1.55 * quantity);
if (product == "cofee") Console.WriteLine(0.45 * quantity);
if (product == "water") Console.WriteLine(0.70 * quantity);
if (product == "beer") Console.WriteLine(1.10 * quantity);
if (product == "sweets") Console.WriteLine(1.35 * quantity);
if (product == "peanuts") Console.WriteLine(1.55 * quantity);