I am bidding on a installation contract of over $4500.00 (my price)worth of plantings (small trees, shrubs, flowers)etc. This is my biggest one time job. On a job this big, how do you guys price your quote. There is removal of existing plants, but not much. The app. of mulch, about 2 yards of loam, a little grass seed, and a large flower bed. Do you just charge a % over the cost of your supplies needed, to cover the labor.