using System;
using System.Linq;
using System.Collections.Generic;

namespace _04._Orders
{
    class Program
    {
        static void Main(string[] args)
        {
            var productsCatalogue = new Dictionary<string, List<double>>();
            string command = Console.ReadLine();

            while (command != "buy")
            {
                var priceAndQuantity = new List<double>();
                string productName = string.Empty;
                var productInfo = command
                    .Split()
                    .ToArray();

                productName = productInfo[0];
                priceAndQuantity.Add(double.Parse(productInfo[1]));
                priceAndQuantity.Add(int.Parse(productInfo[2]));

                if (!productsCatalogue.ContainsKey(productName))
                    productsCatalogue.Add(productName, priceAndQuantity);
                else
                {
                    productsCatalogue[productName][1] += priceAndQuantity[1];
                    productsCatalogue[productName][0] = priceAndQuantity[0];
                }

                command = Console.ReadLine();
            }

            foreach (var item in productsCatalogue)
            {
                double price = item.Value[0];
                double quantity = item.Value[1];
                double totalPrice = price * quantity;

                Console.WriteLine($"{item.Key} -> {totalPrice:F2}");
            }
        }
    }
}