grouptravelmethodscode

using System;

public class Program
{
    public static void Main()
    {

            int groupSize = int.Parse(Console.ReadLine());
            string package = Console.ReadLine();
            double price=0;

            string hallName=HallName(groupSize);
            price=CalculatePrice(groupSize,package,price);


           if (groupSize<=120)
            {
                Console.WriteLine("We can offer you the {0}",hallName);
                Console.WriteLine("The price per person is {0:f2}$",price/groupSize);
            }
            else
            {
                Console.WriteLine("We do not have an appropriate hall.");
            }
    }
    public static double CalculatePrice(int groupSize,string package,double price)
    {
            bool smallgroup= 0<groupSize && groupSize<50;
            bool middleSizeGroup= 50<groupSize && groupSize<=100;
            bool bigGroup=groupSize>100 && groupSize<=120;


        if (smallgroup)
            {
               HallName(groupSize);
               switch(package)
               {
                   case "Normal":
                     price = (2500 + 500) - ((2500 + 500) * 0.05);
                    return price;

                 case "Gold":
                    price= (2500 + 750) - ((2500 + 750) * 0.10);
                    return price;
                case "Platinium":
                    price = (2500 + 1000) - ((2500 + 1000) * 0.15);
                    return price;
               }

            }

            if (middleSizeGroup)
            {
                HallName(groupSize);
                switch(package)
                {
                    case "Normal":
                      price = (5000 + 500) - ((5000 + 500) * 0.05);
                    return price;

                 case "Gold":
                      price = (5000 + 750) - ((5000 + 750) * 0.10);
                    return price;

                case "Platinium":
                     price = (5000 + 1000) - ((5000 + 1000) * 0.15);
                    return price;
                }
            }

            if(bigGroup)
            {
                HallName(groupSize);
                  switch(package)
                {
                    case "Normal":
                     price = (7500 + 500) - ((7500 + 500) * 0.05);
                   return price;

                 case "Gold":
                      price = (7500 + 750) - ((7500 + 750) * 0.10);
                    return price;

                case "Platinium":
                      price = (7500 + 1000) - ((7500 + 1000) * 0.15);
                    return price;
                }
            }

        return 0;

    }
    public static string HallName(int groupSize)
    {
            bool smallgroup= 0<groupSize && groupSize<50;
            bool middleSizeGroup= 50<groupSize && groupSize<=100;
            bool bigGroup=groupSize>100 && groupSize<=120;


         if(bigGroup)
            {
              return"Great Hall";
            }
         if (middleSizeGroup)
            {
              return "Terrace";
         }
         if (smallgroup)
            {
               return"Small Hall";
         }
        return null;
    }
}