How much does this cost to the nearest dollar?

Lightspeed Zulu/Sierra Aviation Headset Control Mount Clip Adapter Accessory Upgrade, Black, Better Than Shirt Clip, Dual Plug, 6-pin, U-174 Compatible…
Get your Lightspeed Zulu/Sierra control modules off the floor. Mount anywhere in your cockpit with secure, clip-in design. Safer and more effective than shirt clips. Low-cost way to protect your $1000 headset and minimize distractions with improved cockpit ergonomics. Keep your controls at your fingertips. Durable, UV resistant, temperature resistant, impact resistant plastic Attach easily with double-sided adhesive (included) Low glare surface finish for reduced reflections during night flying Brand Nirvana Aviation, Material Plastic, Dimensions LxWxH 5.4 x 1.2 x 1.6 inches

Price is $31.00
Price: $30.99