public String toString(){
        DecimalFormat pay = new DecimalFormat("$#,##0.00");
        
        String str = super.toString();
        
        str += "\nShift";
        
        if(shift == DAY_SHIFT)
            str += "Day";
        else if(shift == NIGHT_SHIFT)
            str += "Night";
        else
            str += "INVALID SHIFT SELECTION";
        
        if(payRate > 0)
            str += "\nPay Rate per Hour:" + pay.format(payRate);
        else
            str += "\nPay Rate per Hour:" + "INVALID PAY RATE";
        return str;
    }