Output	Price	Total Cost	Total Revenue	Total Profit
1	$100	$80	_____	_____
2	90	130	_____	_____
3	80	190	_____	_____
4	70	260	_____	_____
5	60	340	_____	_____

18. Refer to above the table. Using the profit-maximization rule, a monopolist will charge a price of

A) $90. B) $80. C) $70. D) $60.