import java.util.Scanner;

public class Fundamentals9 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double availableMoney = Double.parseDouble(scanner.nextLine());
        int studentCount = Integer.parseInt(scanner.nextLine());
        double saberPrice = Double.parseDouble(scanner.nextLine());
        double robePrice = Double.parseDouble(scanner.nextLine());
        double beltPrice = Double.parseDouble(scanner.nextLine());
        double freebelts = 0.00;

        for (int i = 1; i <= studentCount; i++) {
            if (i % 6 == 0) {
                freebelts += beltPrice;
            }
        }
        double moneyNeeded = (saberPrice * Math.ceil(studentCount * 1.10)) + (robePrice * studentCount) + (studentCount * beltPrice) - freebelts;

        if (availableMoney <= moneyNeeded) {
            System.out.printf("Ivan Cho will need %.2flv more.", moneyNeeded - availableMoney);
        } else {
            System.out.printf("The money is enough - it would cost %.2flv.", moneyNeeded);
        }
    }
}