im trying to figure out a quick price on application of momentum fx2 via a stihl sg20 backpack sprayer. i pay about 80 bucks per gallon of momentum (includes tax) and am mixing at a rate of 1-1.5 ounces per gallon of water. I want to charge two customers who asked me for this application by gallon applied to their yard. they are rather small patches, one is less than 2K and the other not even 1K of turf. I was thinking $20 per gallon applied. i hate asking, but does this seem right? we have done plenty of granular apps but im a bit more concerned about this liquid app.