How much does this cost to the nearest dollar?

Lutron Skylark Preset Eco-Life Dimmer Switch, Single-Pole,
Go green by installing a Lutron Skylark Eco-Dim Dimmer! Replace a standard with Skylark eco-dim and save 15% instantly - and use only as much light as you need. Designed for use with an incandescent or halogen bulb, the bulbs connected to the dimmer will last more than 3X their rated life. Dim the lights just 50% to save 40% electricity and extend bulb life 20 times. Use the rocker switch to turn light on/off and the slider to dim the lights---creating your perfect ambiance. Skylark is easy to install wherever there is an existing switch. Using standard 3-way wiring and screw terminals makes for a retrofit. Skylark

Price is $30.00

Price: $29.73