Alphabet Company Buys Different Letters for Resale

Alphabet Company buys different letters for resale.It buys A thru J on January 1 at $4 per letter,and sells C on January 15.On February 1,it buys K thru L at $6 per letter and sells A and K on February 9.It then buys M thru O on March 1 at $7 per letter and sells F,L,M,N,and O on March 19.If the company uses the LIFO method on a perpetual basis,what is the cost of goods sold?

A) $32
B) $41
C) $45
D) $56