using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            double amount;
            int county;
            double tax;
            double salestax;
            double totaldue;

            Console.WriteLine("Enter purchase amount:");
            amount = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter county code:");
            county = Convert.ToInt32(Console.ReadLine());
            while ((county >= 5) && (county <= 30))
            {
                if (county <= 8)
                {
                    tax = 0.05;
                }
                else if (county >= 8 & county <= 20)
                {
                    tax = 0.06;
                }
                else
                {
                    tax = 0.07;
                }
                salestax = amount * tax / 100;
                totaldue = amount + salestax;

                Console.WriteLine("Sales tax = ", salestax);
                Console.WriteLine("Total due = ", totaldue);

                Console.WriteLine("Press enter to continue ...");
                Console.ReadLine();
            }
        }
    }
}