Hi:
The difference will depend on how many surfaces you need to fill. For example, surface fillers are cheaper than surface fillers. The easiest way to do that is to do a general check-up, about $40 to $80, depending on where you go. Most dentists in Australia will give you a printed job with Numbers (your dental number) and how many surfaces you need to fill.
Once you've seen a dentist, you can walk around, offering the best price for your fillings and the work you need to do, such as cleans.
Hope this can help!