FruitMarket

using System;

namespace FruitMarket
{
	class Program
	{
		public static void Main(string[] args)
		{
			var fruit = Console.ReadLine().ToLower();
			var dayOfWeek = Console.ReadLine().ToLower();
			var quantity = double.Parse(Console.ReadLine());
			double price = -1;
			double total = 0;
			if(dayOfWeek == "monday" || dayOfWeek == "tuesday" || dayOfWeek == "wednesday" || dayOfWeek == "thursday" || dayOfWeek == "friday")
			{
				if(fruit == "banana") price = 2.50;
				else if(fruit == "apple")  price = 1.20;
				else if(fruit == "orange") price = 0.85;
				else if(fruit == "grapefruit") price = 1.45;
				else if(fruit == "kiwi") price = 2.70;
				else if(fruit == "pineapple") price = 5.50;
				else if(fruit == "grapes") price = 3.85;
			}
			if(dayOfWeek == "saturday" || dayOfWeek == "sunday")
			{
				if(fruit == "banana") price = 2.70;
				else if(fruit == "apple")  price = 1.25;
				else if(fruit == "orange") price = 0.90;
				else if(fruit == "grapefruit") price = 1.60;
				else if(fruit == "kiwi") price = 3.00;
				else if(fruit == "pineapple") price = 5.60;
				else if(fruit == "grapes") price = 4.20;
			}
			if(price <= 0)
			{
				Console.WriteLine("error");
			}
			else
			{
				total = price * quantity;
				Console.WriteLine("{0:f2}", total);
			}
			Console.Write("Press any key to continue . . . ");
			Console.ReadKey(true);
		}
	}
}