How much does this cost to the nearest dollar?

TORQUE Airbag Air Bag Suspension Kit for Chevy Silverado GMC Sierra 2500HD 3500HD 2500 HD 3500 HD Rear Helper Bag Spring Towing 5000 lbs (Replaces Firestone Ride Rite 2613)
FITMENT - Fits the following years 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 11 12 13 14 15 16 17 18 19 20 21 22 23 REPLACE - This air helper spring kit is direct OEM replacement to Firestone Ride Rite which is suitable for 2011 - 2023 model Chevrolet Silverado / GMC Sierra 

Price is $300.00
Price: $299.99