package PodgotovkaZaIzpit;

import java.util.Scanner;

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

        String name = scanner.nextLine();
        int adultTicketCount = Integer.parseInt(scanner.nextLine());
        int kidTicketCount = Integer.parseInt(scanner.nextLine());
        double adultPrice = Double.parseDouble(scanner.nextLine());
        double servicePrice = Double.parseDouble(scanner.nextLine());

        double kidsPrice = adultPrice*0.3;

        double adultPriceWthSer = adultPrice + servicePrice;
        double kidPriceWthSer = kidsPrice + servicePrice;

        double allSum = (adultPriceWthSer*adultTicketCount) + (kidPriceWthSer*kidTicketCount);

        double profit = allSum*0.2;

        System.out.printf("Izrechenie %.2f ", profit);

    }
}