public void GrossFromNetCalculatesProperly()
        {
            double result = TaxConverter.GrossFromNet(100, 27);

            Assert.AreEqual(127, result);
        }
        public void NetFromGrossCalculatesProperly()
        {
            double result = TaxConverter.NetFromGross(127, 27);

            Assert.AreEqual(100, result);
        }