The following table presents the demand schedule for product Z: 
Assuming that the price of Z at equilibrium is $12, what is the total consumer surplus?
Definitions:
Superior Articular Facet
The upper joint surface of a vertebra that connects with the adjacent vertebra, facilitating spinal flexibility and support.
Costal Facet
A surface on a vertebra that connects with the rib, allowing for the rib cage's structure and movement.
Vertebral Foramen
The central opening in a vertebra through which the spinal cord passes.
Intervertebral Foramen
An opening between adjacent vertebrae through which nerves and blood vessels pass.
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