How much does this cost to the nearest dollar?

Lutron Radio Pwr Savr Maestro Wireless RF Daylight Sensor, White
From the Manufacturer Now you don't have to worry about remembering to turn the lights off in your hallway with Radio Power Saver by Lutron---a wireless, wall-mounted vacancy sensor. Lutron vacancy sensors automatically turn off the lights every time you exit a room, saving you money and energy. Replace your current switch with a Maestro Wireless dimmer/switch (MRF2 models) and place the Radio Power Saver in your hallway or room. Because it is wireless, there is no need for costly wiring. Radio Power Saver sensors by Lutron install in as little as 15 minutes and communicate with compatible Lutron Maestro Wireless dimmers, switches and light control systems using reliable Clear Connect RF Technology

Price is $90.00

Price: $90.18