using System;
using System.Linq;
class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        decimal[] income = new decimal[n];
        decimal[] expences = new decimal[n];
        decimal[] profit = new decimal[n];

        for (int i = 0; i < n; i++)
        {
            int adultsCount = int.Parse(Console.ReadLine());
            decimal adultsPrice = decimal.Parse(Console.ReadLine());
            int youthsCount = int.Parse(Console.ReadLine());
            decimal youthsPrice = decimal.Parse(Console.ReadLine());
            decimal fuelPrice = decimal.Parse(Console.ReadLine());
            decimal fuelConsum = decimal.Parse(Console.ReadLine());
            int flightDur = int.Parse(Console.ReadLine());

            income[i] = adultsCount * adultsPrice + youthsCount * youthsPrice;
            expences[i] = flightDur * fuelConsum * fuelPrice;
            profit[i] = income[i] - expences[i];

            if (profit[i] < 0)
            {
                Console.WriteLine("We've got to sell more tickets! We've lost {0:F3}$.", profit[i]);
            }
            else
            {
                Console.WriteLine("You are ahead with {0:f3}$.", profit[i]);
            }
        }
        decimal overall = profit.Sum();
        decimal average = profit.Average();
        Console.WriteLine("Overall profit -> {0:F3}$.", overall);
        Console.WriteLine("Average profit -> {0:F3}$.", average);
    }
}