yeah I have only sprayed trees once before and when I did it, it was for an existing customer and we did it for him cheaper. I have my pesticide license for when we treat our gravel pits with roundup. So I am allowed to use whatever I just don't have much experience with spraying trees in general. Thats why I am trying to figure how much to charge. The cost for the material seemed pretty cheap so I didn't know how to get an idea for it. I will be using a f450 truck with a 200 gallon lesco sprayer.