How much does this cost to the nearest dollar?

Safety Sensor Kit with Brackets, Replacement for Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible with Liftmaster/Chamberlain/Craftsman Garage Door openers Made After 1997
Safety Sensor Kit with Brackets can Replacement for craftsman/Chamberlain/Liftmaster garage door sensor, To ensure maximum safety in the operation of your garage opener. The system uses an invisible infrared beam to pass through the door opening, detect anything passing through the LED beam, and automatically reverse the closed garage door, keeping children and pets safe. You need to replace your Safety Sensor when you encounter the following situations 1. There are no obstacles, but the garage door stops reversing. 2. The green light is on but the yellow light is off, please replace the

Price is $29.00
Price: $28.99