if a monopolist is able to increase the amount of product she sells from 300 to 325 units by lowering the price of that product from $30 to $25, her marginal revenue is:

The increase in revenue that results from the sale of one additional unit of output is referred to as marginal revenue. While marginal revenue can remain constant over a certain level of output, the law of diminishing returns dictates that it will eventually slow down as output level increases.

Marginal Revenue is the amount of money earned by a company for each additional sale. In other words, it determines how much money a company would make from selling one more item. For example, if a baker sells an extra loaf of bread for $2, their marginal revenue is $2 as well. The marginal revenue is the extra revenue generated by increasing the quantity. This is also referred to as "at the margin" revenue.

In this case, the marginal revenue will be:

= (325 - 300) / ($30 - $25)

= 25 / 5

= $5

In conclusion the marginal revenue is $5.

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