using System;

namespace HelloSoftUni
{
    class Program
    {
        static void Main(String[] args)
        {
            int chickenMenu = int.Parse(Console.ReadLine());
            int fishMenu = int.Parse(Console.ReadLine());
            int veganMenu = int.Parse(Console.ReadLine());
            // chicken - 10.35
            // fish -12.40
            // vegan - 8.15
            // desert 20% from all price
            // delivery  2.50

            double price = (((chickenMenu * 10.35) + (fishMenu * 12.40) + (veganMenu * 8.15)) + (((chickenMenu * 10.35) + (fishMenu * 12.40) + (veganMenu * 8.15)) * 0.20) + 2.50);
            Console.WriteLine(price);


        }
    }
}