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)
        {
            //            •   Първият ред – броят възрастни хора.Цяло число в интервала[1…100]
            //•   Вторият ред – броят ученици. Цяло число в интервала[1… 100]
            //•   Третият ред – броят нощувки. Цяло число в интервала[1... 60]
            //•   Четвъртият ред – вид транспорт – “train”, “bus”, “boat” или “airplane”

            int oldPeopleCount = int.Parse(Console.ReadLine());
            int studentsCount = int.Parse(Console.ReadLine());
            int sleepovers = int.Parse(Console.ReadLine());
            string transportType = Console.ReadLine().ToLower();

            double oldPeopleTransportCosts = 0.0;
            double studentsTransportCosts = 0.0;
            if (transportType == "train")
            {
                oldPeopleTransportCosts = oldPeopleCount * 24.99;
                studentsTransportCosts = studentsCount * 14.99;

                if (oldPeopleCount + studentsCount >= 50)
                {
                    oldPeopleTransportCosts *= 0.5;
                    studentsTransportCosts *= 0.5;
                }
            }
            else if (transportType == "bus")
            {
                oldPeopleTransportCosts = oldPeopleCount * 32.50;
                studentsTransportCosts = studentsCount * 28.50;
            }
            else if (transportType == "boat")
            {
                oldPeopleTransportCosts = oldPeopleCount * 42.99;
                studentsTransportCosts = studentsCount * 39.99;
            }
            else if (transportType == "airplane")
            {
                oldPeopleTransportCosts = oldPeopleCount * 70.0;
                studentsTransportCosts = studentsCount * 50.0;
            }

            double totalTransportCosts = (oldPeopleTransportCosts + studentsTransportCosts) * 2.0;
            double totalSleepoverCosts = sleepovers * 82.99;

            double totalCostsWithoutComission = totalTransportCosts + totalSleepoverCosts;
            double comission = totalCostsWithoutComission * 0.1;

            double totalCosts = totalCostsWithoutComission + comission;

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