Need to cover the rootballs of about 110 azaleas that are sitting above the soil. I figured about 1 cubic yard of topsoil or 1 squard foot per plant. Also wants mulch in the beds which I figured to be about 13 cubic yards. $856 sound about right? Never know how to estimate these. Would you just say material cost plus a per man hour fee(ex $425 for mulch/topsoil + $30 per man hour labor)?