package HomeWork;

import java.util.Scanner;

public class CharityCampaign {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // Вход
        int dayOfCampaign = Integer.parseInt(scanner.nextLine());
        int numberOfConfectioner = Integer.parseInt(scanner.nextLine());
        int countOfCakes = Integer.parseInt(scanner.nextLine());
        int countOfWaffles = Integer.parseInt(scanner.nextLine());
        int countOfPancakes = Integer.parseInt(scanner.nextLine());
        // Пресмятане
        double cakePrice = 45.00;
        double wafflePrice = 5.8;
        double panCakePrice = 3.2;

        double earnedPerChefForDayCakes = countOfCakes * cakePrice;
        double earnedPerChefForDayWaffles = countOfWaffles * wafflePrice;
        double earnedPerChefForDayPanCakes = countOfPancakes * panCakePrice;
        double totalPriceAllChefs = (earnedPerChefForDayCakes + earnedPerChefForDayPanCakes + earnedPerChefForDayWaffles) * 8;
        double moneyEarnedEntireCampaign = totalPriceAllChefs * dayOfCampaign;
        double amountAfterCoveringTheCosts = moneyEarnedEntireCampaign - (moneyEarnedEntireCampaign / numberOfConfectioner);
        // Принт
        System.out.printf("%.2f", amountAfterCoveringTheCosts);
    }
}