01.

using System;

namespace Tennis_Courts
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int count = int.Parse(Console.ReadLine());
    //surface -> 1300$
    //net -> 3200$
    //ball -> 10$


    double totalPrice = 0;


    for (int i = 1; i <= count; i++)
    {
        string equipment = Console.ReadLine();

        if (equipment == "surface")
        {
            totalPrice += 1300;

        }
        else if (equipment == "net")
        {
            totalPrice += 3200;

        }
        else if (equipment == "ball")
        {
            totalPrice += 10;

        }
    }
    Console.WriteLine($"{totalPrice:F2}");
        }
    }
}