Rafael purchased stock last year as follows:

Month	Shares	Total Cost
July	25	$ 2,500
August	50	$4,500
September	80	$8,000

In October of this year, Rafael sells 85 shares for $7,500. Rafael cannot specifically identify the stock sold. The basis for the 85 shares sold is

A) $7,500.

B) $9,550.

C) $10,500.

D) $19,250