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

namespace _04Orders
{
    class Program
    {
        static void Main(string[] args)
        {
            var products = new Dictionary<string, double[]>();


            string input = string.Empty;

            while ((input = Console.ReadLine()) != "buy")
            {
                string[] tokens = input.Split();
                string name = tokens[0];
                double price = double.Parse(tokens[1]);
                double quantity = double.Parse(tokens[2]);

                if (!products.ContainsKey(name))
                {
                    products[name] = new double[2];
                }

                products[name][0] = price;
                products[name][1] += quantity;
            }

            foreach (var product in products)
            {
                Console.WriteLine($"{product.Key} -> {(product.Value[0] * product.Value[1]):F2}");
            }
        }

    }
}