using System;

public class Program

{

    public static void Main()

    {

        double koz = double.Parse(Console.ReadLine());

        double egg = double.Parse(Console.ReadLine());

        double krb = double.Parse(Console.ReadLine());

        double cenakoz = koz*3.20;

        double cenaegg = 4.35*egg;

        double cenakrb = 5.40*krb;

        double paint = 0.15*egg*12;

        double raz = cenaegg+cenakrb+cenakoz+paint;

        Console.WriteLine("Разходите са {0:F2}лв." ,raz);

    }

}