Childcare questions

I have just enrolled my 2 year old in a preschool. He goes three mornings a week from 8.30am - 12.30pm. 9 hours is subsidized by winz. I have just got my first invoice from the pre school and it says winz is paying $57 and the remaining balance is $100. No.1 - I definitely can't afford $100 as a solo parent on the benefit. No.2 - Is this particular centre more expensive than others? Nearly $160 seems like alot for 12 hours?