using System;

namespace P06_EasterDecoration
{
    class P06_EasterDecoration
    {
        static void Main(string[] args)
        {
            int clients = int.Parse(Console.ReadLine());
            double totalPrice = 0.0;

            for (int i = 0; i < clients; i++)
            {
                string command = Console.ReadLine();
                double price = 0.0;
                int productCount = 0;
                while ("Finish" != command)
                {
                    productCount++;
                    switch (command)
                    {
                        case "basket":
                            price += 1.50;
                            break;
                        case "wreath":
                            price += 3.80;
                            break;
                        case "chocolate bunny":
                            price += 7;
                            break;
                    }
                    command = Console.ReadLine();
                }
                if (productCount % 2 == 0)
                {
                    double discount = price * 0.2;
                    price -= discount;
                }
                Console.WriteLine($"You purchased {productCount} items for {price:F2} leva.");
                totalPrice += price;
            }
            Console.WriteLine($"Average bill per client is: {totalPrice / clients:F2} leva.");
        }
    }
}