using System;

namespace _09._Padawan_Equipment
{
    class Program
    {
        static void Main(string[] args)
        {
            float budget = float.Parse(Console.ReadLine());
            double students = double.Parse(Console.ReadLine());
            float saberPrice = float.Parse(Console.ReadLine());
            float robesPrice = float.Parse(Console.ReadLine());
            float beltsPrice = float.Parse(Console.ReadLine());

            //we should buy 10% more sabers
            //every 6th belt is free

            double numSabers = Math.Ceiling(students + (students * 0.10));
            double totalSaberPrice = saberPrice * numSabers;
            double totalRobesPrice = robesPrice * students;
            int totalFreeBelts = (int)students / 6;
            double totalBeltsPrice = beltsPrice * (students - totalFreeBelts);
            double totalMoneyNeed = totalSaberPrice + totalRobesPrice + totalBeltsPrice;

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

        }
    }
}