I’ve never purchased these from BRS, so I can’t say for sure what the price used to be for the 1 gallon container. But the clearance section of their website shows $14 as the clearance price and $20 as the old regular price. Then you are comparing the bulk clearance price of the old product to the price of the pre-portioned mix to make 1 gallon of mixture, which is $7. It would be more fair compare to the new 7 pound bag, which costs $23 and makes the same amount of mixture as the old 1 gallon container. So for the equivalent amount of product, the regular price went from $20 to $23, a 15% increase. Your description above makes it sound like they tripled the price.
Disclaimer: I do not work for BRS and have never purchased that product. So I don’t know if the 1 gallon container was commonly available for $14. But even if it was, comparing same size containers would be a 64% increase, not 200+%.