How much does this cost to the nearest dollar?

SuperSprings | SumoSprings Rear for Chevrolet Silverado GMC Sierra Yellow
SumoSprings are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and ride comfort. They are maintenance free, do not leak air, and do not require airlines or compressors. SumoSprings are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications. They are manufactured from proprietary closed micro-cellular urethane providing a smooth and progressive spring rate with superior damping properties. Sold as a pair (left and right) Maintenance-free Enhances load carrying ability 2800 (lb) Capacity at 50% Compression Reduces and stabilizes sway Manufacturer Super Springs, Brand SuperSprings, Model Weight 8 pounds,

Price is $310.00
Price: $309.99