07.AlcoholMarket

import java.util.Scanner;

public class AlcoholMarket_07 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner (System.in);

        double whiskeyPrice = Double.parseDouble(scanner.nextLine());
        double beerLiters = Double.parseDouble(scanner.nextLine());
        double wineLiters = Double.parseDouble(scanner.nextLine());
        double rakiaLiters = Double.parseDouble(scanner.nextLine());
        double whiskeyLiters = Double.parseDouble(scanner.nextLine());

        double rakiaPrice = whiskeyPrice / 2;
        double winePrice = rakiaPrice - 0.4 * rakiaPrice; //0.6 * rakiaPrice
        double beerPrice = rakiaPrice - 0.8 * rakiaPrice; // 0.2 * rakiaPrice

        double totalPrice = (whiskeyPrice * whiskeyLiters)
                + (winePrice * wineLiters)
                + (rakiaPrice * rakiaLiters)
                + (beerPrice * beerLiters);

        System.out.printf("%.2f", totalPrice);
    }
}