How much does this cost to the nearest dollar?

Mackie MC Series, Control Surface Extension (MC Extender Pro)
The Mackie Control Extender Pro control surface extension lets you expand your Mackie Control Universal Pro control surface, eight motorized, touch-sensitive faders at a time. Proprietary Mackie communication protocol for seamless software integration by DAW makers 100mm touch-sensitive optical Alps motorized faders Multi-function V-Pots for fast control of panning, effects levels and more Channel mute, solo, pan, send level and record arm functions Full meter display with track names and parameters Weight 5 Kilograms, Dimensions 19.6 x 14.1 x 6.6 inches, model number MC Extender Pro, Rank Musical Instruments Digital Audio Workstation Controllers 91, Is Discontinued No, Available August

Price is $
Price: $899.99