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. What is the minimum price that Sergei needs to receive for a tub of ice cream to stay in business in the long run?
Definitions:
Position
The location of something or someone in relation to other objects or individuals.
Endergonic Reaction
A nonspontaneous reaction; a reaction requiring a net input of free energy. Compare with exergonic reaction.
Exergonic Reaction
A reaction characterized by a release of free energy. Also called spontaneous reaction. Compare with endergonic reaction.
Free Energy
The amount of internal energy within a system that is available to perform work, as in chemical reactions and physical processes.
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