03. Restaurant Discount

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

namespace _03_Restaurant_Discount
{
    class Program
    {
        static void Main(string[] args)
        {
            int GroupSize = int.Parse(Console.ReadLine());
            string Package = Console.ReadLine();
            double Price = 0;
            double discount = 0;
            double packagePrice = 0;
            CalcDiscountPackage(Package, out discount, out packagePrice);

            if (GroupSize <= 50)
            {
                Price = 2500;
                double PricePerPerson = CalcPricePerPerson(GroupSize, Price, discount, packagePrice);
                Console.WriteLine("We can offer you the Small Hall");
                Console.WriteLine($"The price per person is {PricePerPerson:f2}$");
            }
            else if (50 < GroupSize && GroupSize <= 100)
            {
                Price = 5000;
                double PricePerPerson = CalcPricePerPerson(GroupSize, Price, discount, packagePrice);
                Console.WriteLine("We can offer you the Terrace");
                Console.WriteLine($"The price per person is {PricePerPerson:f2}$");
            }
            else if (100 < GroupSize && GroupSize <= 120)
            {
                Price = 7500;
                double PricePerPerson = CalcPricePerPerson(GroupSize, Price, discount, packagePrice);
                Console.WriteLine("We can offer you the Great Hall");
                Console.WriteLine($"The price per person is {PricePerPerson:f2}$");
            }
            else
            {
                Console.WriteLine("We do not have an appropriate hall.");
            }
        }

        private static double CalcPricePerPerson(int GroupSize, double Price, double discount, double packagePrice)
        {
            return (Price + packagePrice) * (1 - discount) / GroupSize;
        }

        private static void CalcDiscountPackage(string Package, out double discount, out double packagePrice)
        {
            if (Package == "Normal")
            {
                packagePrice = 500;
                discount = 0.05;
            }
            else if (Package == "Gold")
            {
                packagePrice = 750;
                discount = 0.1;
            }
            else
            {
                packagePrice = 1000;
                discount = 0.15;
            }
        }
    }
}