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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Dictionary<string, List<double>> products = new Dictionary<string, List<double>>();

            while (input != "buy")
            {
                string[] productInfo = input.Split();

                string currentProduct = productInfo[0];
                double priceForOneProduct = double.Parse(productInfo[1]);
                double quantity = double.Parse(productInfo[2]);

                if (!products.ContainsKey(currentProduct))
                {
                    products.Add(currentProduct, new List<double> {priceForOneProduct, quantity});
                }
                else
                {
                    foreach (var product in products)
                    {
                        if (product.Key == currentProduct)
                        {
                            product.Value[0] = priceForOneProduct;
                            product.Value[1] += quantity;
                        }
                    }
                }

                input = Console.ReadLine();
            }

            foreach (var product in products)
            {
                product.Value[0] = product.Value[0] * product.Value[1];

                Console.WriteLine($"{product.Key} -> {product.Value[0]:f2}");
            }
        }
    }
}