There are 130 firms in a perfectly competitive market, with supply curves of q = 0.3P - (100/13).
Market demand is given by Q = 600 - P
a. Find the equilibrium market quantity and price.
b. We can show that the firm's total cost equals. Given this cost curve, and your result from above, would firms enter or exit this market? Show me using algebra how you know (hint: what do firms want above all things?).