3.Vacation - C# Fundamentals

using System;
using System.Runtime.CompilerServices;
using System.Threading;

namespace demo
{
    class Program
    {
        static void Main()
        {
            int people = int.Parse(Console.ReadLine());
            string typeGroup = Console.ReadLine();
            string day = Console.ReadLine();

            decimal total = 0.00m;

            if (typeGroup == "Business" && people >= 100)
            {
                people -= 10;
            }

            if (day == "Friday")
            {
                if (typeGroup == "Students")
                {
                    total = people * 8.45m;
                }

                else if (typeGroup == "Business")
                {
                    total = people * 10.90m;
                }

                else if (typeGroup == "Regular")
                {
                    total = people * 15.00m;
                }
            }

            else if (day == "Saturday")
            {
                if (typeGroup == "Students")
                {
                    total = people * 9.80m;
                }

                else if (typeGroup == "Business")
                {
                    total = people * 15.60m;
                }

                else if (typeGroup == "Regular")
                {
                    total = people * 20.00m;
                }
            }

            else if (day == "Sunday")
            {
                if (typeGroup == "Students")
                {
                    total = people * 10.46m;
                }

                else if (typeGroup == "Business")
                {
                    total = people * 16.00m;
                }

                else if (typeGroup == "Regular")
                {
                    total = people * 22.50m;
                }
            }

            if (typeGroup == "Students" && people >= 30)
            {
                total *= 0.85m;
            }

            bool checkNumberOfRegulars = 10 <= people && people <= 20;
            if (typeGroup == "Regular" && checkNumberOfRegulars)
            {
                total *= 0.95m;
            }
            Console.WriteLine($"Total price: {total:F2}");

        }
    }
}