How much does this cost to the nearest dollar?

Waterdrop Countertop Water Filter, Replacement for AQ 4035, AQ 4025, Will Fit AQ4500 Drinking Water Systems
Premium quality Waterdrop filters are of premium quality, dedicated to improving water quality. Hassle free installation It is easy to install requiring no tools. Advanced filtration material It uses natural coconut activated carbon block that can reduce contaminants effectively while keeping useful substances and giving you an energy boost.(The activated carbon is made from natural coconut shells. Please confirm whether you are allergic to it.) Filter life Enjoy fresh water by replacing your water filter every 6 months or 450 gallons, whichever comes first will vary based on water condition. Replacement model and Will fit the following systems AQ 4500, AQ 4501, AQ 4000, AQ 4050,

Price is $31.00
Price: $30.59