The following data is for a profit-maximizing firm operating in a perfectly competitive market. Answer the question below on the basis of the data contained in the table. Quantity $ TC $AVC $ATC $ MC 100 140 40 140 40 160 30 70 20 190 30 63.3 30 OONOUAWNPO 240 35 60 50 300 40 60 60 370 45 61.7 70 450 50 64.3 80 350 56.3 68.8 100 If the price is $70 per unit, what are the profit-maximizing output and the level of profit or loss? A 4 and $40 B 6 and $50 C 5 and $75 D 7 and $50