How much does this cost to the nearest dollar?

Callahan Front and Rear Calipers and Drilled Slotted Brake Disc Rotors + Ceramic Brake Pads + Hardware Kit For Cadillac Escalade | Chevy Silverado 1500 Subuarban 1500 Tahoe | GMC Sierra 1500 Yukon
This kit is compatible with 2002 Cadillac Escalade - All Models 2003 - 2006 Cadillac Escalade 4WD - All Models 2002 Chevrolet Avalanche 1500 - w/Dual Piston Rear Calipers and Limited Slip Axle 2003 - 2006 Chevrolet Avalanche 1500 4WD - All Models 2001 Chevrolet Silverado 1500 4WD - 6 Lug w/Dual Piston Rear Calipers 2004 - 2006 Chevrolet Silverado 150

Price is $639.00
Price: $639.48