Johnson's controls, a computer chip producer, has the ability to set price. The number of units it expects to sell is given in the table below. Assuming this firm's marginal cost is a constant $10 per unit, what price should it charge and how many units should this firm produce? Price Quantity $24 40 $22 $20 $18 100 60 80 $18; 100 units $20; 80 units $24; 100 units $22; 60 units $24: 40 units