using System;

namespace _9._Padawan_Equipment
{
    class Program
    {
        static void Main(string[] args)
        {
            //The amount of money Ivan Cho has – floating - point number in range[0.00…1, 000.00]
            // The count of students – integer in range[0…100]
            // The price of lightsabers for a single sabre – floating - point number in range[0.00…100.00]
            //  The price of robes for a single robe – floating - point number in range[0.00…100.00]
            //   The price of belts for a single belt – floating - point number in range[0.00…100.00]


            double money = double.Parse(Console.ReadLine());
            int students = int.Parse(Console.ReadLine());
            double priceForLightsabers = double.Parse(Console.ReadLine());
            double priceForRobes = double.Parse(Console.ReadLine());
            double priceForBelts = double.Parse(Console.ReadLine());

            double totalPrice = 0;
            int belts = students / 6;
            double students1 = Math.Ceiling((students * 0.1) + students);





            totalPrice = (students1 * priceForLightsabers) + ((students-belts) * priceForBelts) + (students * priceForRobes);

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

        }
    }
}