Pedregon Corporation has provided the following information: 
If the selling price is $20.50 per unit, the contribution margin per unit sold is closest to:
Definitions:
Leptin
A hormone produced by fat cells that helps to regulate body weight by inhibiting hunger, thus acting as an appetite suppressant.
Stomach Contractions
Involuntary movements of the stomach muscles, often associated with hunger or digestion processes.
Walter Cannon
A physiologist known for his work on the fight or flight response and the concept of homeostasis in the human body.
Set Point
A theory suggesting that an individual's body weight is maintained around a biologically predetermined point, influenced by genetics and environment.
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