The Boxwood Company sells blankets for $33 each. The following was taken from the inventory records during May. The company had no beginning inventory on May 1.

Date	Blankets	Units	Cost
May 3	Purchase	7	$14
10	Sale	4
17	Purchase	10	$16
20	Sale	5
23	Sale	2
30	Purchase	8	$23

Assuming that the company uses the perpetual inventory system, determine the cost of goods sold for the sale of May 20 using the LIFO inventory cost method.

a.$32

b.$56

c.$184

d.$80