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.
"Opportunity is missed by most because it is dressed in overalls and looks like work"- Thomas Edison, businessman/inventor