Taylor can sell 10 blankets for $90 each, 20 blankets for $80 each, 30 blankets for $70 each, 40 blankets for $60 each, 50 blankets for $50 each, and 60 blankets for $40 each. Her marginal cost of production is constant at $50 for each additional unit (or blanket) produced. If she behaves like a monopolist, what is the number of blankets she will sell? 20 30 40 50