First time bidding installation of 24" box trees. I'm in SF Bay Area, California. Clay soil is typical here, back yard installation with good access. I would not be using any equipment to install the trees. I'm just guesstimating here but I'm thinking it would take me and a helper about 3 hours to plant, and stake each tree. So am thinking $600 labor for two trees, plus delivery and whatever the trees cost. Thoughts? Is this the right price to charge?