using System;

namespace padawan
{
    class Program
    {
        static void Main(string[] args)
        {
            double budget = double.Parse(Console.ReadLine());
            double numberOfStudents = double.Parse(Console.ReadLine());
            double lightSaberPrice = double.Parse(Console.ReadLine());
            double robePrice = double.Parse(Console.ReadLine());
            double beltPrice = double.Parse(Console.ReadLine());

            double lightSaberNumber = numberOfStudents + Math.Ceiling((numberOfStudents * 0.10));
            double freeBelt = Math.Floor(numberOfStudents / 6);

            double price = (lightSaberNumber * lightSaberPrice) + (numberOfStudents * robePrice) + ((beltPrice * numberOfStudents) - freeBelt * beltPrice);

            if (price > budget)
            {
                Console.WriteLine($"Ivan Cho will need {Math.Abs(budget - price):f2}lv more.");
            }
            else
            {
                Console.WriteLine($"The money is enough - it would cost {price:f2}lv.");
            }
        }
    }
}