using System;

public class Program

{

    public static void Main()

    {

        int broipileshko = int.Parse(Console.ReadLine());

        int broiriba = int.Parse(Console.ReadLine());

        int broivegetarian = int.Parse(Console.ReadLine());

        double pricepileshko = broipileshko * 10.35;

        double priceriba = broiriba * 12.40;

        double pricevegetarian = broivegetarian * 8.15;

        double total = pricepileshko + priceriba + pricevegetarian;

        double pricedessert = 0.2 * total;

        double pricedelivery = 2.50;

        total += pricedessert + pricedelivery;

        Console.WriteLine(total + "лв.");

    }

}