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

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            var whiskey = double.Parse(Console.ReadLine());
            var kolbira = double.Parse(Console.ReadLine());
            var kolvino = double.Parse(Console.ReadLine());
            var kolrakia = double.Parse(Console.ReadLine());
            var kolwhiskey = double.Parse(Console.ReadLine());

            var rakia = whiskey / 2;
            var bira = kolbira / kolbira * (rakia - (0.8 * 25));
            var vino = kolvino / kolvino * (rakia - (0.4 * 25));

            var sumrakia = kolrakia * rakia;
            var sumbira = kolbira * bira;
            var sumvino = kolvino * vino;
            var sumwhiskey = whiskey;

            var result = sumrakia + sumbira + sumvino + sumwhiskey;


            Console.WriteLine(result);

        }
    }
}