import java.util.Scanner;

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

        double budget = Double.parseDouble(scanner.nextLine());
        int students = Integer.parseInt(scanner.nextLine());
        double priceOfFlour = Double.parseDouble(scanner.nextLine());
        double priceOfEgg = Double.parseDouble(scanner.nextLine());
        double priceOfApron = Double.parseDouble(scanner.nextLine());

        //count of aprons should be 20% more, rounded up to the next integer
        int countOfArons = (int) Math.ceil(students * 1.2);

        //every fifth package of flour is free.
        int freePackages = students / 5;

        double neededMoney = priceOfApron * countOfArons +
                priceOfEgg * 10 * students +
                priceOfFlour * (students - freePackages);

        if (neededMoney <= budget) {
            System.out.printf("Items purchased for %.2f$.", neededMoney);
        } else {
            System.out.printf("%.2f$ more needed.", neededMoney - budget);
        }
    }
}