How much does this cost to the nearest dollar?

Swift Green Filters SGF-M9 Replacement water filter for 1, White, 1 Pack
Product Description Help save the environment with this green filter that is an original equipment replacement. Compared to Conventional carbon-based filters, Swift green filter products are. Conventional carbon filters are produced by a burning process called open pit charring which release pollution and greenhouse emissions into the air. Green filter components are produced with a new technology that carbonizes dried coconut shells in an enclosed self-sustaining system while capturing and converting the emissions into useful thermal energy. The filters are NSF Certified which ensures consumers of drinking clean and safe water. The filters are tested and certified by NSF International to NSF / ANSI Standard 42 for the aesthetic reduction of chlorine taste and odor and nominal particulate class I, as well as

Price is $21.00

Price: $20.66