using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp14
{
    class Program
    {
        static void Main(string[] args)
        {
            double money = double.Parse(Console.ReadLine());
            double profitDay = double.Parse(Console.ReadLine());
            double expence = double.Parse(Console.ReadLine());
            double gift = double.Parse(Console.ReadLine());

            double profitWeek = (money * 5 + profitDay * 5) - expence;

            if (profitWeek>=gift)
            {
                Console.WriteLine($"Profit: {profitWeek} BGN, the gift has been purchased.");
            }
            else if (profitWeek<gift||profitWeek==0)
            {
                Console.WriteLine($"Insufficient money: {Math.Abs(profitWeek-gift):f2} BGN.");
            }
        }
    }
}