Hi guys, have been reading this site for a while now but finally need alittle help. I'm trying to put together a bid for a project and not quite sure what the average cost per complete install of these items would be. They all include excavation, preparation, placement, mulch and disposal of unused excavated material. Obviously I would have more play on what I charged per unit on the grasses and perennials due to the number but what about the others specifically? Is there a rule of thumb when it comes to bidding these types of things? 18, tall trees 6'-10' 8, large shrubs 3'-4' 48 small shrubs 2-3 gal 2132 grasses and perennials 1qt Any hints or suggestions would be extremely useful!