public class CashRegisterTester
{
   public static void main(String[] args)
   {
      CashRegister register = new CashRegister();

      register.recordPurchase(8.37);
      register.recordPurchase(5.01);
      register.recordPurchase(3.45);
      register.enterPayment(20, 0, 0, 0, 0);

      System.out.println("Items in sale: " + register.getItemCount());
      System.out.println("Change: " + register.giveChange());

      register.recordPurchase(8.37);
      register.recordPurchase(5.01);
      register.enterPayment(20, 0, 0, 0, 0);

      System.out.println("Items in sale: " + register.getItemCount());
      System.out.println("Change: " + register.giveChange());
   }
}