using System;
class Program
{
    static void Main()
    {
        decimal numberFlights = decimal.Parse(Console.ReadLine());

        decimal totalProfit = 0;

        for (int i = 0; i < numberFlights; i++)
        {
            decimal adultPassCount = decimal.Parse(Console.ReadLine());
            decimal adultTicketCount = decimal.Parse(Console.ReadLine());

            decimal youthPassCount = decimal.Parse(Console.ReadLine());
            decimal youthTicketCount = decimal.Parse(Console.ReadLine());

            decimal fuelPriceperHour = decimal.Parse(Console.ReadLine());
            decimal fuelConsumptionPerHour = decimal.Parse(Console.ReadLine());
            decimal flightDuration = decimal.Parse(Console.ReadLine());


            decimal income = adultPassCount * adultTicketCount + youthTicketCount * youthPassCount;
            decimal expenses = flightDuration * fuelConsumptionPerHour * fuelPriceperHour;

            decimal profit = income - expenses;

            if (profit >= 0)
            {
                Console.WriteLine("You are ahead with {0:f3}$.", profit);
            }
            else
            {
                Console.WriteLine("We've got to sell more tickets! We've lost -{0:f3}$.", expenses - income);
            }
            totalProfit = totalProfit + profit;

        }
        Console.WriteLine("Overall profit -> {0:f3}$.", totalProfit);
        Console.WriteLine("Average profit -> {0:f3}$.", totalProfit / numberFlights);

    }
}