The graph illustrates the demand for haircuts and the costs of producing haircuts. Draw a point to indicate the profit-maximizing output and price if this market is perfectly competitive. Label the competitive equilibrium EC. Draw a point to indicate the profit-maximizing output and price if the haircut producer is a single-price monopoly. How are the curves identified when a perfectly competitive industry is taken over by a single firm? The competitive industry's curve becomes tha mnnnnalv's nurva Which of the following firms is most likely to be a monopoly? A. a computer store B. a shoe store C. a local distributor of electricity D. a local fast-food restaurant