How much does this cost to the nearest dollar?

Xfinity Door Window Sensor Home Security (Latest Generation 2023)
Secure and monitor your home with Xfinity Home door/window sensors, and create rules to get real-time alerts if any door or window is opened unexpectedly. Essential security and easy home automation Set rules to get real-time alerts when doors and windows are opened or closed. And always know when the kids get home from school safely, if they left a door ajar, or when your dog walker arrives. Stay connected with the Xfinity Home app Manage your home anytime, from anywhere. Arm/disarm your system, view your Xfinity Cameras, control your smart lights, locks, and thermostat. And so much more. Compatible with Xfinity only Set Up Instructions 1) Open Smartthings App. Click + to add a device. 

Price is $9.00
Price: $8.79