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

namespace _06.CottegeScrapper
{
    class CottageScrapper
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();
            List<KeyValuePair<string, int>> Data = new List<KeyValuePair<string, int>>();

            while (line !="chop chop")
            {
                string[] tokens = line.Split(new string[] { " -> " }, StringSplitOptions.RemoveEmptyEntries);
                string woodType = tokens[0];
                int meters = int.Parse(tokens[1]);

                Data.Add(new KeyValuePair<string, int>(woodType, meters));
                line = Console.ReadLine();
            }
            string neededWood = Console.ReadLine();
            double minMeters = double.Parse(Console.ReadLine());

            double averageSum =Math.Round( Data.Average(a => a.Value),2);
            double usedLogsPrice = Data.Where(a => a.Value >= minMeters && a.Key == neededWood).Sum(a => a.Value);
            double unUsedLogsPrice = Data.Where(a => a.Value < minMeters || a.Key != neededWood).Sum(a => a.Value);

            usedLogsPrice = Math.Round(usedLogsPrice * averageSum, 2);
            unUsedLogsPrice = Math.Round(unUsedLogsPrice * averageSum * 0.25, 2);
            double total = Math.Round(unUsedLogsPrice + usedLogsPrice, 2);

            Console.WriteLine($"Price per meter: ${averageSum:f2}");
            Console.WriteLine($"Used logs price: ${usedLogsPrice :f2}");
            Console.WriteLine($"Unused logs price: ${unUsedLogsPrice:f2}");
            Console.WriteLine($"CottageScraper subtotal: ${total:f2}");
        }
    }
}