SuppliesForSchool

using System;

namespace _05.SuppliesForSchool
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int numberOfPens = int.Parse(Console.ReadLine());
            int numberOfMarkers = int.Parse(Console.ReadLine());
            int preparatLiters = int.Parse(Console.ReadLine());
            int percent = int.Parse(Console.ReadLine());

            double priceForPens = numberOfPens * 5.80;
            double priceForMarkers = numberOfMarkers * 7.20;
            double priceForPreparat = preparatLiters * 1.20;

            double sumForProducts = priceForMarkers + priceForPreparat + priceForPens;
            double endPercent = sumForProducts - (sumForProducts * percent / 100);

            Console.WriteLine(endPercent);
        }
    }
}