Graph 7-1 
-Refer to Graph 7-1.What area represents total surplus in the market when the price is P₁?
Definitions:
Hours Worked
Hours worked refers to the total number of hours spent by an individual in performing their job duties during a specified period.
Effort Made
The amount of physical or mental energy expended towards accomplishing a task or goal.
Primary Reinforcers
Stimuli that satisfy basic survival needs and thus have intrinsic value, such as food, water, and warmth.
Biological Needs
Fundamental requirements that organisms must satisfy to maintain life, such as food, water, and shelter.
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