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

namespace _04._Orders
{
    class Program
    {
        static void Main(string[] args)
        {
            var check = new Dictionary<string, List<string>>();
            while (true)
            {
                string[] input = Console.ReadLine().Split(' ').ToArray();
                string key = input[0];
                if (key=="buy")
                {
                    foreach (var product in check)
                    {
                        double money = double.Parse(product.Value[0]) * double.Parse(product.Value[1]);

                        product.Value[0] = $"{money:f2}";
                        product.Value.RemoveAt(1);
                    }
                    break;
                }
                string price = input[1];
                string count = input[2];
                if (!check.ContainsKey(input[0]))
                {
                    check.Add(key,new List<string> { price,count} );
                }
                else
                {
                    check[key][0] = price;
                    check[key][1] += count;
                }
            }
            foreach (var product in check)
            {
                Console.WriteLine($"{product.Key} -> {product.Value}");
            }
        }
    }
}