Computer_firm

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

namespace Computer_Firm
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            double totalRate = 0;
            double totalSales = 0;

            for(int i=1; i<=n; i++)
            {
                int computers = int.Parse(Console.ReadLine());
                int rate = computers % 10;
                int sales = computers / 10;
                totalRate += rate;

                if (rate == 3)
                {
                    totalSales += sales * 0.50;
                }
                else if (rate == 4)
                {
                    totalSales += sales * 0.70;
                }
                else if (rate == 5)
                {
                    totalSales += sales * 0.85;
                }
                else if(rate==6)
                {
                    totalSales += sales;
                }
            }
            double average = totalRate / n;
            Console.WriteLine($"{totalSales:f2}");
            Console.WriteLine($"{average:f2}");
        }
    }
}