How much does this cost to the nearest dollar?

PureGuardian Guardian Technologies Humidifier Demineralization Filter, White, 1 Count (Pack of 1)
PureGuardian humidifier Demineralization Filter, Cartridge #3, is easy to use. It helps to prevent the release of minerals (white dust) into the air. It simply screws into the humidifier tank and will last approximately 500 hours. This all depends on the condition of the water you are using in the humidifier as well as run speed. It is still recommended to clean your humidifier often, based on the Manufacturer's Instructions. It is recommended to use with the PureGuardian Models H965, H1010, H1010P PREVENT AIRBORNE MINERALS The Pure Guardian humidifier demineralization filter is easy

Price is $11.00
Price: $10.81