Suppose a perfectly competitive firm 'i' has a total cost function given by the equation TCi = 200 + 2qi^2, and that there are 10 identical firms in this industry.
Also, suppose that there are 100 identical individuals (denoted j) in the economy each with the inverse demand equation P = 200 - 60qj.
How do you solve for the industry supply curve and for the industry demand curve. Solve these for equilibrium industry quantity and price.