using System;

namespace _9._Padawan_Equipment
{
    class Program
    {
        static void Main(string[] args)
        {
            double amountOfMoney = double.Parse(Console.ReadLine());
            int numberOfStudents = int.Parse(Console.ReadLine());
            double priceSaber = double.Parse(Console.ReadLine());
            double priceRobes= double.Parse(Console.ReadLine());
            double priceBelt = double.Parse(Console.ReadLine());


            double sumSaber = (Math.Ceiling(numberOfStudents + numberOfStudents * 0.10)) * priceSaber;
            double sumRobes = numberOfStudents * priceRobes;
            double freeBelts = 0;
            if (numberOfStudents>=6)
            {
                 freeBelts = numberOfStudents / 6;
            }

            double sumBelts = (numberOfStudents-freeBelts) * priceBelt;


            double totalPrice=sumSaber + sumRobes + sumBelts;

            if (totalPrice<=amountOfMoney)
            {
                var a = amountOfMoney - totalPrice;
                Console.WriteLine($"The money is enough - it would cost {totalPrice:f2}lv.");
            }
            else
            {
                var a = totalPrice - amountOfMoney;
                Console.WriteLine($"Ivan Cho will need {a:f2}lv more.");
            }
        }
    }
}