If marginal revenue exceeds marginal cost it is favorable to enter a contract in case of no limitations (enough capacities).

For marginal pricing decisions, usually the fixed cost will be ignored.

The marginal cost is the minimum price at which a business can offer a product or service for sale (on the short run) in case of no limitations (enough capacities).

If marginal revenue exceed marginal cost, it is always better to enter this contract than selling it for a price that covers full cost.

Marginal cost include full cost.