CharityCampaogn

using System;

namespace charityCampaign
{
	class Program
	{
		static void Main (string[] args)
		{
			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 cakesIncome = cakes * 45;
			double wafflesIncome = waffles * 5.80;
			double pancakesIncome = pancakes * 3.20;

			double incomeForOneDay = (cakesIncome + wafflesIncome + pancakesIncome) * bakers;
			double income = incomeForOneDay * days;
			double expenses = income * 1 / 8;
			double result = income - expenses;

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