public void Add()
        {
            //Arrange
            var num1a             = 22.1115m;
            var num1b             = 0.0005m;
            var expectedResponse1 = 22.112m;
            var num2a             = 14.0208m;
            var num2b             = 2.2113m;
            var expectedResponse2 = 16.2321m;
            var num3a             = 51.2369m;
            var num3b             = 11.6528m;
            var expectedResponse3 = 62.8897m;
            var num4a             = 21.6325m;
            var num4b             = -25.1985m;
            var expectedResponse4 = -3.566m;

            //Act
            var response1 = Math.Round(MathFunctions.AddNumbers(num1a, num1b), 4);
            var response2 = Math.Round(MathFunctions.AddNumbers(num2a, num2b), 4);
            var response3 = Math.Round(MathFunctions.AddNumbers(num3a, num3b), 4);
            var response4 = Math.Round(MathFunctions.AddNumbers(num4a, num4b), 4);

            //Assert
            Assert.AreEqual(expectedResponse1, response1);
            Assert.AreEqual(expectedResponse2, response2);
            Assert.AreEqual(expectedResponse3, response3);
            Assert.AreEqual(expectedResponse4, response4);
        }