How much does this cost to the nearest dollar?

DualLiner Truck Bed Kit Fits Dodge Ram with 6'3 Bed Model# (Weld-in TIE Downs)
MODEL Fits RAM Trucks with 6'4 Bed, not compatible with Ram Box. The side walls are made from one of the toughest materials ever made, They are polyethylene exact fit panels that follow the exact contour of your truck. Near the bottom of the sidewall there has been a channel designed to house the Zero Skid Bed mat, this Bed mat is one of the thickest on the market, a full 3/8ths of an inch thick. The Zero Skid mat keeps your cargo in place which protects the cargo as well as the trucks box. Advances in manufacturing allow cleats to be added to the underside of the mat, this keeps the mat

Price is $539.00
Price: $539