Use the following to answer questions: 
-(Table: Total Cost and Output) Look at the table Total Cost and Output, which describes Sergei's total costs for his perfectly competitive all-natural ice cream firm. If the market price of a tub of ice cream is $67.50, how much is Sergei's total revenue at the profit-maximizing output?
Definitions:
Unconscious Memories
Memories that are not within an individual's conscious awareness, often influencing behaviors and decisions without one's explicit understanding.
Cerebellum
The part of the brain at the back of the skull in vertebrates, which coordinates and regulates muscular activity.
Hippocampus
A major component of the brain, located in the medial temporal lobe, playing important roles in the consolidation of information from short-term memory to long-term memory, and in spatial memory that enables navigation.
Types Of Memories
The classification of memory into different types, such as short-term, long-term, procedural, and episodic memory.
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Q304: (Figure: The Profit-Maximizing Output and Price) Look