6.13. Steel market supply. Suppose there are two technologies for producing steel. Technology 1 corresponds to a fixed cost of 450, a marginal cost of 8, and a production capacity of 120. Technology 2 corresponds to a fixed cost of 62, a marginal cost of 13, and a production capacity of 35. Currently, there are 2 firms using Technology 1 and 10 firms using Technology 2. Assuming all firms behave as price takers, derive the industry short-run supply curve