In a monopoly market, the total weekly cost of producing and selling a product is C(m) = 2:32 + 1009: + 1200 The weekly demand of this product is R(a:) = a:2 + 400m What level of production will yield a profit of $6,000? O a) less than 40 units of production 0 b) more than 50 units of production 0 c) 30 or 50 units of production 0 d) 40 or 60 units of production 0 e) more than 60 units of production