How much does this cost to the nearest dollar?

Firestone 2543 Air-Rite Xtreme Duty Air Control System
Air-Rite is a comprehensive offering of air accessories to enhance your Ride-Rite air helper springs. Choosing among the Air Command products has now become easier. Xtreme Duty Air Command with 2 gallon tank is ideal for heavy use, large fill (RV/Truck Tires). Air spring pressure control kit with electric, single-gauge control Pneumatic, single-gauge control panel with white face Single-path system levels 1 pair of air springs equally Kit includes everything you need to control air springs Manufacturer Firestone, Brand Firestone, Model FIR, Weight 27.5 Pounds, Dimensions 22 x 14 x 10.5 inches, Country of Origin USA, model number 2543, Is

Price is $528.00
Price: $528.26