Norris bought the following shares of stock last year.

Month	Shares	Total Cost
March	50	$135
July	100	300
October	300	$600

On December 15 of this year Norris sells 80 shares for $325. Norris cannot specifically identify the stock sold. The average basis per share for the 80 shares sold is

Select one:

a. $85.50

b. None of the above

c. $80

d. $108

e. $92

f. $120