using System;
using System.Text;


namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {


            int Days = Convert.ToInt32(Console.ReadLine());
            int Candymen = Convert.ToInt32(Console.ReadLine());
            int Cakes = Convert.ToInt32(Console.ReadLine());
            int Gofretas = Convert.ToInt32(Console.ReadLine());
            int pancakes = Convert.ToInt32(Console.ReadLine());
            //------------------------------
            double Cake_Price = 45.00;
            double Gofrettes_Price = 5.80;
            double pancakes_Price = 3.20;
            //------------------------------
            double Sum_For_Campaign = (((Cakes * Cake_Price) + (Gofretas * Gofrettes_Price) + (pancakes * pancakes_Price)) * 8.00) * 23;
           // double Sum_After_Expenses = Sum_For_Campaign - (Sum_For_Campaign *  1/8);
            Console.WriteLine(Convert.ToString(Sum_For_Campaign - (Sum_For_Campaign *  1/8)));

                }

            }
        }