01. ChristmasSweets

import java.util.Scanner;

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

        double baklavaPerKg = Double.parseDouble(scanner.nextLine());
        double muffinsPerKg = Double.parseDouble(scanner.nextLine());
        double stollenKg = Double.parseDouble(scanner.nextLine());
        double candiesKg = Double.parseDouble(scanner.nextLine());
        double biscuitsKg = Double.parseDouble(scanner.nextLine());

        double totalStollenPrice = stollenKg * (baklavaPerKg * 1.6);
        double totalCandyPrice = candiesKg * (muffinsPerKg * 1.8);
        double biscuitsTotal = biscuitsKg * 7.50;

        double totalPrice = totalStollenPrice + totalCandyPrice + biscuitsTotal;
        System.out.printf("%.2f",totalPrice);

    }
}