I have an ATV Boomer Sprayer and need help figuring how much chemical to add for 2,4, - D and MSMA. I have a 20 Gallon Tank with adjustable spray pressure. I calibrated it at 107 feet at 7 mph and it took 14 secs to drive the course. I collected 10 oz in 14 secs at 22 PSI. How much MSMA should I add to the 20 gallon tank and how much 2,4,D? Is there a formula I can use to figure this up? Thanks for your help in advance!