using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;


class Program
{
    static void Main()
    {
			double priceCPU = double.Parse(Console.ReadLine()) * 1.57;
            double priceVGA = double.Parse(Console.ReadLine()) * 1.57;
            double priceRAM = double.Parse(Console.ReadLine()) * 1.57;
            int quantityRAM = int.Parse(Console.ReadLine());
            double discount = double.Parse(Console.ReadLine());

            var price = (priceCPU - (priceCPU * discount)) + (priceVGA - (priceVGA * discount)) + (priceRAM * quantityRAM);

            Console.WriteLine($"Money needed - {price:F2} leva.");
    }
}