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

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int sum = 0;
            int tdm = 5899;
            int ctr = 1699;
            int exb = 1789;
            int dumb = 579;
            string[] uredi = new string[4];
            uredi[0] = "treadmill";
            uredi[1] = "cross trainer";
            uredi[2] = "exercise bike";
            uredi[3] = "dumbbells";
            for (int i = 0; i < n; i++)
            {
                var arr = Console.ReadLine();
                if (arr == uredi[0]) sum += tdm;
                else if (arr == uredi[1]) sum += ctr;
                else if (arr == uredi[2]) sum += exb;
                else if (arr == uredi[3]) sum += dumb;
            }
            Console.WriteLine("{0:f2}", sum);
        }
    }
}