What's wrong with this code?

Simple Exception handling

    public class TaxCalculationException : ApplicationException
    {
        private string _zipCode;
        public TaxCalculationException(string zipCode, Exception ex)
            : base("An error occurred while processing tax.", ex)
        {
            _zipCode = zipCode;
        }
    }

    public class MyCustomApplicationException : ApplicationException
    {
        public string ProblemDetails { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            const double basePrice = 100.00d;
            const string zipCode = "55116";

            var totalPrice = CalculateTaxDue(basePrice, zipCode);

            Console.Write("Your purchase for {0} dollars in zipcode {1} costs {2}", 100, "55116", totalPrice);
        }

        public static double CalculateTaxDue(double purchasePrice, string zipCode)
        {
            var totalPrice = 0;

            try
            {
                var stateTax = new StateTaxCalculator(zipCode).Calculate(purchasePrice);                
                var cityTax = new CityTaxCalculator(zipCode).Calculate(purchasePrice);

                return purchasePrice + stateTax + cityTax;
            }

            catch (NullReferenceException ex)
            {
                throw new TaxCalculationException(zipCode, ex);
            }

            catch (ApplicationException aex)
            {
                throw aex;
            }

            catch (ArgumentException)
            {
                LogFailureToCalculateTaxDue(purchasePrice, zipCode);
            }

            catch (NotSupportedException ex)
            {
                LogExceptionInformation(ex);
                throw new TaxCalculationException(zipCode, ex);
            }

            catch (MyCustomApplicationException ex)
            {
                EmailProblemDetailsToTechSupport(ex.ProblemDetails);
                throw ex;
            }

            return totalPrice;
        }
    }