fewfw

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

namespace Gym
{
    class Program
    {
        static void Main(string[] args)
        {
            byte n = byte.Parse(Console.ReadLine());
            decimal sum = 0;
            string name;

            for (; n > 0; n--)
            {
                name = Console.ReadLine();

                if (name == "treadmill")
                {
                    sum += 5899;
                }
                else if (name == "exercise bike")
                {
                    sum += 1789;
                }
                else if (name == "dumbbells")
                {
                    sum += 579;
                }
                else if (name == "cross trainer")
                {
                    sum += 1699;
                }
            }
            Console.WriteLine($"{sum:f2}");
        }
    }
}