using System;

namespace BobiZadacha
{
    class Program
    {
        static void Main(string[] args)
        {
            double totalMoneySpent = 0;

            int clientsCount = int.Parse(Console.ReadLine());
            for (int i = 0; i < clientsCount; i++)
            {
                int currentBuyerItemsBought = 0;
                double currentBuyerBill = 0;

                while (true)
                {
                    string input = Console.ReadLine();
                    if(input == "Finish")
                    {
                        break;
                    }

                    if(input == "basket")
                    {
                        currentBuyerBill += 1.50;
                        currentBuyerItemsBought++;
                    }
                    else if(input == "wreath")
                    {
                        currentBuyerBill += 3.80;
                        currentBuyerItemsBought++;
                    }
                    else if(input == "chocolate bunny")
                    {
                        currentBuyerBill += 7.00;
                        currentBuyerItemsBought++;
                    }
                }

                if(currentBuyerItemsBought % 2 == 0)
                {
                    currentBuyerBill *= 0.8;
                }

                totalMoneySpent += currentBuyerBill;
                Console.WriteLine($"You purchased {currentBuyerItemsBought} items for {currentBuyerBill:f2} leva.");
            }

            double averageBill = totalMoneySpent / clientsCount;

            Console.WriteLine($"Average bill per client is: {averageBill} leva.");
        }
    }
}