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

namespace ConsoleApplication6
{
    class discount
    {
        static void Main(string[] args)
        {



                double emailusage;

                const double emaildata = 0.02731;

                int month = 30;

                int gig = 1024;

                Console.WriteLine("In a typical day, how often do you do these activities while");
                Console.WriteLine("you're not connected to any wifi?");
                Console.WriteLine();
                Console.WriteLine("Emails:");
                Console.WriteLine("0      5      25      50      100      250+");
                Console.WriteLine("How many emails [without attachments] do you send/receive? ");

                emailusage = double.Parse(Console.ReadLine());

                emailusage = (emailusage * emaildata * month / gig);

                Console.WriteLine(emailusage);




            }
        }
    }