The copper pipe industry consists of 45 identical firms that produce an identical product. The short-run costs for each firm are TC=9q +0.025q2, where q is estimated in hundreds of feet of pipe. The demand for copper pipe is QD=39900-600P, where P is the price of a foot of copper pipe. Assume that the firms are price takers, and input prices are unaffected by industry output.
(i) Find the firm supply curve. Compute the supply curve for the entire industry