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

namespace Exam_March_2019
{
    class MainClass
    {
        struct Equipment
        {
            public static int Treadmill = 5899;
            public static int CrossTrainer = 1699;
            public static int ExerciseBike = 1789;
            public static int Dumbells = 579;
        }

        public static void Main(string[] args)
        {
            float equipmentCost = 0;

            int inputQuantity = int.Parse(Console.ReadLine());
            for (int i = 0; i < inputQuantity; i++)
            {
                string item = Console.ReadLine();

                if (item.Equals("treadmill"))
                {
                    equipmentCost += Equipment.Treadmill;
                }
                else if (item.Equals("exercise bike"))
                {
                    equipmentCost += Equipment.ExerciseBike;
                }
                else if (item.Equals("cross trainer"))
                {
                    equipmentCost += Equipment.CrossTrainer;
                }
                else if(item.Equals("dumbbells"))
                {
                    equipmentCost += Equipment.Dumbells;
                }

            }

            Console.WriteLine("{0:F2}", equipmentCost);

        }
    }
}