using System;

namespace PCstore
{
    class Program
    {
        static void Main()
        {
            decimal priceUSDofCPU = decimal.Parse(Console.ReadLine());
            decimal priceUSDofVideo = decimal.Parse(Console.ReadLine());
            decimal priceUSDofRAM = decimal.Parse(Console.ReadLine());
            int numberRAM = int.Parse(Console.ReadLine());
            decimal discount = decimal.Parse(Console.ReadLine());
            decimal currency = 1.57m;
            decimal totalPrice = ((priceUSDofCPU + priceUSDofVideo) * (1 - discount) + numberRAM * priceUSDofRAM) * currency;
            Console.WriteLine($"Money needed - {totalPrice:F2} leva.");
        }
    }
}