How to find marginal revenue

Instruction
In practical as well as scientific literature, marginal revenue is the difference between the company's revenue and its variable costs. In this case, in fact, the marginal profit contains in its meaning two fundamental components: the fixed costs of the enterprise and its profit. Thus, it turns out that the greater its amount is, the greater will be the probability of compensating the organization’s fixed costs and receiving profit from its business activities.
The most informative definition of marginal revenue is not for the entire composition of production, but only for each nomenclatural unit of output, the following:
MD = (CV - PZ) / Op = p - b, where
Op - is the volume of sales in real (natural) indicators;
p - the price of one product;
b - an indicator of variable costs per unit of production.
In turn, the essence of the marginal analysis is based on the analysis of the ratio of sales (or output), cost, and profit based on the prediction of the level of these values ​​under given constraints.
Analysis of marginal income is the definition of the volume of production, which, at a minimum, provides coverage for the sum of variable costs, that is, each subsequent unit of the product should not increase the total loss of the organization.
Thus, marginal revenue is the increment of total income as a result of an increase in output by one unit:
MD = AD (Q) / AQ, where
BP (Q) - the increment of total income;
AQ is the increment value per 1 unit of product.