Vacation

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

namespace Vacation
{
    class Program
    {
        static void Main(string[] args)
        {
            int purvi = int.Parse(Console.ReadLine());
            int vtori = int.Parse(Console.ReadLine());
            int treti = int.Parse(Console.ReadLine());
            string chetvurti = Console.ReadLine();



            if (chetvurti == "train" && purvi + vtori >= 50)
            {
                double Train = (purvi * 24.99) / 2 + (vtori * 14.99) / 2;
                Train = Train * 2;
                double hotel = (treti * 82.99);
                double komisionna = (Train + hotel) * 0.10;
                double suma = Train + hotel + komisionna;
                Console.WriteLine("{0:f2}", suma);
            }
            else if (chetvurti == "train")
            {
                double Train = (purvi * 24.99) + (vtori * 14.99);
                Train = Train * 2;
                double hotel = (treti * 82.99);
                double komisionna = (Train + hotel) * 0.10;
                double suma = Train + hotel + komisionna;
                Console.WriteLine("{0:f2}", suma);
            }
            else if (chetvurti == "bus")
            {
                double Bus = (purvi * 32.50) + (vtori * 28.50);
                Bus = Bus * 2;
                double BusHotel = (treti * 82.99);
                double komisionnaBus = (Bus + BusHotel) * 0.10;
                double sumaBus = Bus + BusHotel + komisionnaBus;
                Console.WriteLine("{0:f2}", sumaBus);
            }
            else if (chetvurti == "boat")
            {
                double Boat = (purvi * 42.99) + (vtori * 39.99);
                Boat = Boat * 2;
                double BoatHotel = (treti * 82.99);
                double komisionnaBoat = (Boat + BoatHotel) * 0.10;
                double sumaBoat = Boat + BoatHotel + komisionnaBoat;
                Console.WriteLine("{0:f2}", sumaBoat);
            }
            else if (chetvurti == "airplane")
            {
                double airplane = (purvi * 70.00) + (vtori * 50.00);
                airplane = airplane * 2;
                double AirpalneHotel = (treti * 82.99);
                double komisionnaAirplane = (airplane + AirpalneHotel) * 0.10;
                double sumaAirplane = airplane + AirpalneHotel + komisionnaAirplane;
                Console.WriteLine("{0:f2}", sumaAirplane);
            }
        }
    }
}