Match tickets

using System;

namespace MatchTickets
{
    class Program
    {
        static void Main(string[] args)
        {
            double budget = double.Parse(Console.ReadLine());
            string typeTickets = Console.ReadLine().ToLower();
            int quantityPeople = int.Parse(Console.ReadLine());
            var calculateBudget = 0.0;
            var calculateTickets = 0.0;
            var result = 0.0;
            var yes = "";
            var no = "";
            calculateTickets = (typeTickets == "vip") ? 499.99 * quantityPeople : 249.99 * quantityPeople;

            var first = quantityPeople >=1  && quantityPeople <= 4;
            var second = quantityPeople >= 5 && quantityPeople <= 9;
            var third = quantityPeople >= 10 && quantityPeople <= 24;
            var fourth = quantityPeople >= 25 && quantityPeople <= 49;
            var fifth = quantityPeople > 50;

            if (first == true)
            {
                calculateBudget = budget * 0.25;
            }
            if (second == true)
            {
                calculateBudget = budget * 0.4;
            }
            if (third == true)
            {
                calculateBudget = budget * 0.5;
            }
            if (fourth == true)
            {
                calculateBudget = budget * 0.6;
            }
            if (fifth == true)
            {
                calculateBudget = budget * 0.75;
            }
            if ((calculateBudget - calculateTickets) > 0)
            {
                result = calculateBudget - calculateTickets;
                yes = $"Yes! You have {result:f2} leva left.";
                Console.WriteLine(yes);
            }
            if ((calculateBudget - calculateTickets) < 0)
            {
                result = calculateTickets - calculateBudget;
                no = $"Not enough money! You need {result:f2} leva.";
                Console.WriteLine(no);
            }
        }
    }
}