Charity

import java.util.Scanner;

public class P17Charity {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        Double days = Double.parseDouble(scanner.nextLine());
        Double conf = Double.parseDouble(scanner.nextLine());
        Double cakes = Double.parseDouble(scanner.nextLine());
        Double wafles = Double.parseDouble(scanner.nextLine());
        Double pan = Double.parseDouble(scanner.nextLine());

        Double cakeprise = cakes * 45;
        Double wafleprise = wafles * 5.8;
        Double panprise = pan * 3.2;

        Double day1 = (cakeprise  + wafleprise + panprise) * conf;

        Double alldays = day1 * days;
        Double Charity = alldays * 0.875;

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

    }
}