Yeah, I probably pay $100-$150 a year for public school for 1 child.
Fee's are optional, & only I think $20 a year. Uniforms are pretty cheap if you go to Big W (they stock most uniform colours). Its only around $5 for each item of clothing. Maybe $20 for shoes.
There aren't many excursions etc in the first few years, & what there is, the P&C often tries to help with the costs to reduce the amount parents pay.
TBH, it wouldn't be fair. I know you guys are trying to do the right thing by your DSD, but that just wouldn't be it.
Good luck working it out though.