The profit-maximizing choice for a perfectly competitive firm will occur at the level of output where marginal revenue is equal to marginal cost—that is, where MR = MC. This occurs at Q = 80 in the figure.
Marginal revenue is the increase in revenue that results from the sale of one additional unit of output.
While marginal revenue can remain constant over a certain level of output, it follows from the law of diminishing returns and will eventually slow down as the output level increases.
<h3>How do u calculate marginal revenue?</h3>
To calculate marginal revenue, you take the total change in revenue and then divide that by the change in the number of units sold.
The marginal revenue formula is: marginal revenue = change in total revenue/change in output.
Learn more about marginal revenue here:
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