Магазин за плодове

using System;

class Program
{
    static void Main()
    {
        string fruit = Console.ReadLine().ToLower();
        string day = Console.ReadLine().ToLower();
        double value = double.Parse(Console.ReadLine());
        var price = -1.0;


         if (day == "monday" || day == "tuesday" || day == "wednesday" ||
             day == "thursday" || day == "friday")
         {
             if (fruit == "banana")
             {
                var result = (value * 2.50) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
             }
            else if (fruit == "apple")
            {
                var result = (value * 1.20) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "orange")
            {
                var result = (value * 0.85) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "grapefruit")
            {
                var result = (value * 1.45) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "kiwi")
            {
                var result = (value * 2.70) + price+ 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "pineapple")
            {
                var result = (value * 5.50) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "grapes")
            {
                var result = (value * 3.85) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else
            {
                Console.WriteLine("error");
            }
        }
        else if (day == "saturday" || day == "sunday")
        {
            if (fruit == "banana")
            {
                var result = (value * 2.70) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "apple")
            {
                var result = (value * 1.25) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "orange")
            {
                var result = (value * 0.90) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "grapefruit")
            {
                var result = (value * 1.60) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "kiwi")
            {
                var result = (value * 3.00) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "pineapple")
            {
                var result = (value * 5.60) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else if (fruit == "grapes")
            {
                var result = (value * 4.20) + price + 1.0;
                Console.WriteLine(Math.Round(result, 2));
            }
            else
            {
                Console.WriteLine("error");
            }
        }
        else
        {
            Console.WriteLine("error");
        }

        if (price >= 0)
        {
            Console.WriteLine("{ 0:f2 }", price * value);
        }
    }
}