In regards to optimal output, what is marginal cost and marginal revenue?

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Marginal cost and marginal revenue are the factors that are used to determine what the optimal output should be for any firm.  The marginal cost is the cost of making the next unit of output.  The marginal revenue is the amount of revenue that is gotten from selling the next...

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Marginal cost and marginal revenue are the factors that are used to determine what the optimal output should be for any firm.  The marginal cost is the cost of making the next unit of output.  The marginal revenue is the amount of revenue that is gotten from selling the next unit that is made.  In order for a firm to maximize its profit, it needs to produce an optimal output.  The optimal output is defined as the level of output at which the marginal cost and the marginal revenue are equal to one another.

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