Are you paying $2,800 plus $350 and $350?
The $350 sounds a bit high to me as it sounds like the only thing they need to do is enter figures into your tax return. The distribution from trust shouldn't be too hard as this should be included in the $2,800 that you are paying.
Yes $350 + GST for each individual (Therefore $770) and $2600 + GST for HDT. I feel I also get valuable advice throughout the year also which is not charged and probably included in this cost