How much does this cost to the nearest dollar?

Humidifier Cleaner Demineralization, Tank Cleaner Prevents Hard Water Build-Up, Water Cartridge Eliminates White Dust, Cleaning Ball Removes Odor, for All humidifiers, Fish Tank,9 Pack
Bring You Healthy Water Humidifier Cleaner helps to purifying water, prevent odors, reduce the white-dust and mould growth caused by minerals in hard water. Be Friendly to Humidifier The Humidifier Demieralization Cartridge extends the lifetime of humidifier. Strong Compatibility The Humidifier Cleaner suits for all humidifiers, such as Ultrasonic, Cool Mist (impeller), Warm Mist, Evaporative and Steam Vaporizer. It can also works in fish tanks. Easy to Use Just drop the humidifier cleaning ball into tank and it will start to work. Be remember to

Price is $12.00

Price: $11.99