How much does this cost to the nearest dollar?

Indoor Humidity Monitor Temperature and Humidity Sensor
This Indoor Humidity Monitor Temperature and Humidity Sensor Offers a Clear and Bright Display Showing Time, Batter Life, Ambient Humidity and Air Temperature for Managing Your Indoor Climate and Ensuring Comfort with Proper Humidity Levels Inside Your Home. Clear and bright display showing time, battery life, ambient humidity and air temperature for managing your indoor climate and ensuring comfort and proper humidity levels inside your home or office Inconspicuous profile and color allow you to place the device anywhere without it seeming out of place Battery operated so no cords or wires to worry about Easy click functionality to change time as needed and to toggle between Celsius and Fahrenheit as desired Made of environmentally friendly ABS + HD digital LCD display Dimensions 5.04 x 4.57 x 2

Price is $18.00

Price: $17.99