Fruit Shop

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Fruit_Shop
{
    class Program
    {
        static void Main(string[] args)
        {

            string fruit = Console.ReadLine();
            string day = Console.ReadLine();
           double quantity = double.Parse(Console.ReadLine());

            if ((day == "Saturday") || (day == "Sunday"))
            {
                if (fruit == "banana")
                { Console.WriteLine($"{quantity*2.70:f2}"); }
                else if (fruit == "apple")
                { Console.WriteLine($"{1.25 * quantity:f2}"); }
                else if (fruit == "orange")
                { Console.WriteLine($"{0.90 * quantity:f2}"); }
                else if (fruit == "grapefruit")
                { Console.WriteLine($"{1.60 * quantity:f2}"); }
                else if (fruit == "kiwi")
                { Console.WriteLine($"{3.00 * quantity:f2}"); }
                else if (fruit == "pineapple")
                { Console.WriteLine($"{5.60 * quantity:f2}"); }
                else if (fruit == "grapes")
                { Console.WriteLine($"{4.20 * quantity:f2}"); }
                else
                { Console.WriteLine("error"); }
            }
            else if ((day == "Monday") || (day == "Tuesday") || (day == "Wednesday") || (day == "Thursday") || (day == "Friday"))
            {
                if (fruit == "banana")
                { Console.WriteLine($"{2.50 * quantity:f2}"); }
                else if (fruit == "apple")
                { Console.WriteLine($"{1.20 * quantity:f2}"); }
                else if (fruit == "orange")
                { Console.WriteLine($"{0.85 * quantity:f2}"); }
                else if (fruit == "grapefruit")
                { Console.WriteLine($"{1.45 * quantity:f2}"); }
                else if (fruit == "kiwi")
                { Console.WriteLine($"{2.70 * quantity:f2}"); }
                else if (fruit == "pineapple")
                { Console.WriteLine($"{5.50 * quantity:f2}"); }
                else if (fruit == "grapes")
                { Console.WriteLine($"{3.85 * quantity:f2}"); }
                else
                { Console.WriteLine("error"); }
            }
            else
            { Console.WriteLine("error"); }
        }
    }
}