单项选择题

Questions 169-171 refer to the following table.

Hotels	Prices	Other related information
The Castle lnn	$12/single;$15/double	Continental breakfast including coffee,tea,jam and honey.
The Dalton Hotel	$30/single;$60/double	Bathroom attached to every room;no charge for children under 12
The Park Hotel	$16/person;$25/half board;$29/full board	Bathroom attached to every room.Half-board includes dinner,bed and breakfast.Full-board is the room plus all meals.
The Phoenix	$28/double+bath	Breakfast excluded

Mr. Smith, his wife and his 11-age son want to live in the Dalton Hotel, how much will they spend