public class Toy extends StoreItem implements Taxable
{
  protected int upperAge;
  protected int lowerAge;
  public final static double TAX = 0.04;
  
  public Toy(String id, double price, 
             int upperAge, int lowerAge)
  {
    super(id, price);
    this.upperAge = upperAge;
    this.lowerAge = lowerAge;
  }
  
  public double calculateTax()
  {
    return(price * TAX);
  }
  
  public String toString()
  {
    StringBuffer sb = new StringBuffer();
    sb.append(super.toString());
    sb.append(" Upper age: " + upperAge +
              " Lower age: " + lowerAge);
    return sb.toString();
  }
  
}