Suppose the market for e-cigarettes consists of two types of firms: 100 firms of type A and 30 firms of type B. Each type A firm has a total cost T CA = 0.25q2 + 25. Each type B firm has a total cost T CB = 0.05q2 + 25. Type B firms have fixed costs which are sunk, but type A firms have costs which are fully avoidable. T