using System;

public class Program

{

    public static void Main()

    {

 int days = int.Parse(Console.ReadLine());

 int cook = int.Parse(Console.ReadLine());

 int cakes = int.Parse(Console.ReadLine());

 int wafles = int.Parse(Console.ReadLine());

 int pancakes = int.Parse(Console.ReadLine());

 double cakePrice = cakes * 45;

 double wafflePrice = waffle *5.80;

 double pancakesPrice = pancakes *3.20;

 double dayTotalPrice = cakePrice + wafflePrice + pancakesPrice;

 double totalProfit = dayTotalPrice * cook;

 double totalProfitAll = totalProfit * days;

 double cost = totalProfitAll /8;

 double finalprofit = totalProfitAll - cost;

 Console.WriteLine($"{finalprofit:F2}");

     )

​

}