Use the following to answer question: 
-(Table: Total Cost and Output) Use 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 $20,how much is Sergei's profit at the optimal short-run output?
Definitions:
Direct Labor
The work performed by individuals directly involved in the manufacturing of goods or provision of services.
Production Costs
The costs incurred by a business in manufacturing a product or providing a service, including materials, labor, and overhead.
Total Cost
The complete cost involved in the production, operation, or activity, including both fixed and variable costs.
Work in Process
Inventory that is in the production process and has not yet been completed or transferred to the finished goods inventory.
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