How much does this cost to the nearest dollar?

Backup Camera System - 4 Camera Setup with Quad View Display by Rear View Safety
7 TFT LCD color monitor with single, double, triple and quad viewing options Two heavy duty backup cameras each with an IP69K waterproof rating and a 130 degrees viewing angle Two heavy duty side cameras each with an IP68 waterproof rating and a 120 degrees viewing angle All cameras have excellent night vision with infra-red lights (Backup - 18 lights, Side - 9 lights) System comes complete with all mounts and cables and is ready for installation right out of the box Brand Rear View Safety, Screen Size 7 Inches, Dimensions 14\ L x 9\ W x 14\ H, Lux rating 20 Lux, Compatible Devices Monitor, Display Technology LCD, Installation Type Surface Mount, Voltage 

Price is $858.00
Price: $857.99