fixed will produce smaller quantities and enjoy lower profits or even a loss. will produce smaller quantities and enjoy the same profits will produce the same quantities but enjoy lower profits or even a loss. 109) In the perfectly competitive market for plastic sandals, every firm has exactly the same marginal cost curves. If every firm has a marginal cost curve with a constant slope of 2, and there are 10 firms in the industry, what is the slope of the industry supply curve? 1/5 in