using System;

​

​

public class Program

{

    public static void Main(string[] args)

    {

        int tshirtPrice = 20;

        int jeansPrice = 50;

        int trainersPrice = 70;

        int jacketPrice = 60;

        var sum = 0;

        int count = int.Parse(Console.ReadLine());

        for (int i =0; i < count; i++)

        {

            string cloth = Console.Readline();

            switch (cloth)

            {

                case "t-shirt":

                    sum += tshirtPrice;

                    break;

                case "jeans":       

                    sum += jeansPrice;

                    break;

                case "trainers":

                    sum += trainersprice;

                    break;

                case "jacket":

                    sum += jacketPrice;

                    break;

                        Console.WriteLine("This product doesn't exist");

                     break;

            }

         }  

                    Console.WriteLine(sum:F2);

        }       

     }