a perfectly competitive firm will maximize profit when a. total revenue exceeds total cost b. marginal revenue exceeds marginal cost price equals marginal cost d. price equals marginal benefit marginal benefit exceeds marginal cost• 6. A perfectly competitive firm will maximize profit when • a. total revenue exceeds total cost. • b. marginal revenue exceeds marginal cost. • c. price equals marginal cost. • d. price equals marginal benefit. • e. marginal benefit exceeds marginal • cost