Your bid will of course have to be based on material costs. Make sure you have everything you need and skip any extras or unnecessaries. I based mine on materials recommended by Greendoctor at the time. I thought using paraquat and Glphosate in the same mix was overkill when I first saw it in this thread as well. However, I lack the experience to know that some of these particular products enhance the effect of others. In my bid, blue dye was a requirement and had to be included in the list of materials to be used too. Blue dye is not cheap and its something I almost never use and didn't even think about in my material costs until I got a list of prerequisites for the bidding process.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.