using System;

public class Program

{

    public static void Main()

    {

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

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

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

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

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

        double CakesPerDay = cakes * 45.00;

        double WafflesPerDay = waffles * 5.80;

        double PanckakesPerDay = pancakes * 3.20;

        double MoneyPerDay = (CakesPerDay + WafflesPerDay + PanckakesPerDay) * days * bakers;

        double RaisedMoneyForTheCampaign = MoneyPerDay * days;

        double MoneyAfterExpenses = RaisedMoneyForTheCampaign - (1/8 * RaisedMoneyForTheCampaign);

        Console.WriteLine(MoneyAfterExpenses);

    }

}