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 profit at the profit-maximizing output?
Definitions:
Marginal Utility
The additional satisfaction or utility that a consumer derives from consuming one more unit of a good or service.
Marginal Utility
It describes the additional satisfaction or utility that a consumer receives from consuming one more unit of a good or service.
Total Utility
The overall satisfaction or benefit received by consuming a product or service.
Marginal Utility
The additional satisfaction a consumer gains from consuming one more unit of a good or service.
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