Suppose that a pure monopolist can sell 5 units of output at $4 per unit and 6 units at $3.90 per unit.The monopolist will produce and sell the sixth unit if its marginal cost is:

A) $4 or less.
B) $3.90 or less.
C) $3.50 or less.
D) $3.40 or less.

Marginal Cost

Marginal cost is the additional cost incurred by producing one more unit of a good or service, a critical concept for understanding production decisions.

Output Increment

The increase in output that results from employing an additional unit of input, reflecting the productivity of the input in the production process.

Pure Monopolist

A single seller in a market who has exclusive control over a particular good or service and is the only one to provide that good or service.