06. Fruit Shop

using System;

namespace _06._Fruit_Shop
{
    class Program
    {
        static void Main(string[] args)
        {
            string fruits = Console.ReadLine();
            string day = Console.ReadLine();
            double quantities = double.Parse(Console.ReadLine());

            double price = 0;


            if (day == "Monday" || day == "Tuesday" || day == "Wednesday" || day == "Thursday" || day == "Friday")
            {
                switch (fruits)
                {
                    case "banana": price = 2.5; break;
                    case "apple": price = 1.2; break;
                    case "orange": price = 0.85; break;
                    case "grapefruit": price = 1.45; break;
                    case "kiwi": price = 2.7; break;
                    case "pineapple": price = 5.5; break;
                    case "grapes": price = 3.85; break;
                    default:
                        Console.WriteLine("error");
                        return;
                }
            }
            else if (day == "Saturday" || day == "Sunday")
            {
                switch (fruits)
                {
                    case "banana": price = 2.7; break;
                    case "apple": price = 1.25; break;
                    case "orange": price = 0.9; break;
                    case "grapefruit": price = 1.6; break;
                    case "kiwi": price = 3.0; break;
                    case "pineapple": price = 5.6; break;
                    case "grapes": price = 4.2; break;
                    default:
                        Console.WriteLine("error");
                        return;
                }
            }
            else
            {
                Console.WriteLine("error");
                return;
            }

            double sum = price * quantities;

            Console.WriteLine($"{sum:f2}");
        }
    }
}