I agree! Herbicide labels can be confusing due to all the legalize.
The active ingredient in Roundup is glyphosate and it’s one of the safest herbicides used today. Unless there are weeds that are resistant to glyphosate most farmers use 2 quarts of Roundup per 20-25 gallons of water per acre.
There are many variables such as the hardness of the water, the droplet size produced by the sprayer’s nozzles, etc. However, 2 quarts of Roundup mixed with 20-25 gallons of water is a very generic and successful recipe.