Complete the chart below for a firm that is operating under conditions of perfect competition where the market price is $22. What level of output maximizes the firm's profits? 
Definitions:
Eyelids
Foldable covers made of skin and muscle that protect the eyes from debris and help in regulating the amount of light entering the eye.
Iris
The colored part of the eye surrounding the pupil, responsible for controlling the size of the pupil and thus the amount of light that enters the eye.
Photoreceptor Cells
Specialized neurons in the retina that convert light into electrical signals, enabling vision.
Tinnitus
A condition characterized by hearing noises (such as ringing, buzzing, or humming) in the ears when no external sound is present.
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