If you fail the exam in subject 2 and make an appointment for the exam, you will be charged a make-up exam fee. Most tuition fees charged by driving schools do not include make-up fees. If the person in charge of the driving school makes it clear at the time of registration that there is no need to pay for the make-up exam, it is unreasonable to charge the make-up exam again. You can ask them to refund your make-up exam fee. It is not clear that you don't have to pay the make-up exam fee, so you have to pay the make-up exam fee again.
You don't need a bag, and you have to pay a make-up fee if you don't.