snrub: No fair, that's cheating!
Bill D : Whew! Glad that I avoided impalement.
I also went through the exercise to partly answer the unasked question of "Why do applicators cost "X" to spray my pond? What's so hard about dumping in some chemicals to treat the weeds/algae in my pond?"
Yes, there are some shortcuts, and SWAG's are involved to get close, and you can develop spreadsheets. But all of that takes time and experience, and doing that costs $$ too. Think of it as a college education but only on water over a number of years. AND you never stop learning too. Then you have insurance and equipment overhead costs......
