How much does this cost to the nearest dollar?

Pro Products GA65N Poly Guard Scale and Rust Preventer
Pro Poly Guard Scale & Rust Preventer (Powder) is specifically formulated to prevent hard water scale and iron staining in commercial, industrial and residential potable water applications. The scale preventer powder of Poly Guard forms a protective coating on metal and plastic surfaces preventing scale, corrosion and copper leaching. Inject Poly Guard scale preventer powder by chemical feed pump into the raw water system as close to the source as possible. This Poly Guard product is a scale preventer powder that requires mixing before use. Pro Poly Guard is NSF Certified to meet NSF/ANSI Standard 60 for drinking water additives. Helps protect appliances & fixtures by reducing scale build-up NSF Standard 60 certified for drinking water Made in the U.S.A Genuine OEM Product

Price is $57.00

Price: $57.06