public static void Main()
Console.Write("How many coustomer :");
c = double.Parse(Console.ReadLine());
Console.Write("Do you add Sea-Food? : ");
sf = char.Parse(Console.ReadLine());
Console.Write("Are you member? :");
m = char.Parse(Console.ReadLine());
if (sf == 'y' || sf == 'Y')
Console.WriteLine("Total price = {0:n} Baht",total);
else if (m == 'y' || m == 'Y')
Console.WriteLine("Total price = {0:n} Baht",total);
Console.WriteLine("Total price = {0:n} Baht",total);