using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            double SumIvancho = double.Parse(Console.ReadLine());
            double studentsCount = int.Parse(Console.ReadLine());
            double sabresPriceOne = double.Parse(Console.ReadLine());
            double robesPriceOne = double.Parse(Console.ReadLine());
            double beltsPriceOne = double.Parse(Console.ReadLine());

            double sabresMore = Math.Ceiling(studentsCount * 10/100);
            double priceSabres = sabresPriceOne * (studentsCount + sabresMore); ///
            double priceBelts = 0;
            double robesPrice = robesPriceOne * studentsCount;

            if (studentsCount >= 6)
            {
                double priceOtstapkaForBelts = Math.Ceiling(studentsCount / 6); ////
                studentsCount -= priceOtstapkaForBelts;
                priceBelts = beltsPriceOne * studentsCount;
            }
            else
            {
                priceBelts = beltsPriceOne * studentsCount;
            }

            double total = priceSabres + priceBelts + robesPrice;

            double result = Math.Abs(total - SumIvancho);

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




        }
    }
}