using System;

public class Program

{

    public static void Main()

    {

        var rhartiq=int.Parse(Console.ReadLine());

        var rplat=int.Parse(Console.ReadLine());

        var llepilo=double.Parse(Console.ReadLine());

        var namalenie=double.Parse(Console.ReadLine());

        var hartiq1=rhartiq*5.80;

        var hartiq2=hartiq1-namalenie*hartiq1;

        var plat1=rplat*7.20;

        var plat2=plat1-namalenie*plat1;

        var lepilo1=llepilo*1.20;

        var lepilo2=lepilo1-namalenie*lepilo1;

        var vsichko=hartiq2+plat2+lepilo2;

        Console.WriteLine(vsichko);

    }

}