Taxation

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

namespace TaxationCalc
{
    class TaxationCalc
    {
        static void Main()
        {
            double GrossValue = double.Parse(Console.ReadLine());
            double IncomeTax = 0.1;
            double SocialContr = 0.15;
            double sumIncome = (GrossValue - 1000) * IncomeTax;
            double sumSocial = (GrossValue - 1000) * SocialContr;
            double TaxAfterMath = 300;


            if (GrossValue > 1000 && GrossValue <= 3000)
            {
                Console.WriteLine("The Value after tax is {0} IDR", (GrossValue - (sumIncome + sumSocial)));
            }

            if (GrossValue > 3000)
            {
                Console.WriteLine("The Value after tax is {0} IDR", (GrossValue - (sumIncome + TaxAfterMath)));
            }

            if (GrossValue <= 1000)
            {
                Console.WriteLine("The GrossValue is less or equal to 1000 and no taxation applies");
            }
        }
    }
}