How can you calculate Maximum Profit in a Monopoly?

In economics a Monopoly is a firm that lacks any viable competition, and is the sole producer of the industry's product.

The Monopoly maximizes it's Profit at the quantity of output where marginal revenue equals marginal cost.

Marginal revenue represents the change in total revenue associated with an additional unit of output, and marginal cost is the change in total cost for an additional unit of output.