The Boxwood Company sells blankets for $39 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	10	$20
10	Sale	3
17	Purchase	11	$15
20	Sale	4
23	Sale	3
30	Purchase	11	$21

Assuming that the company uses the perpetual inventory system, determine the May 31 inventory balance using the FIFO inventory cost method.

a.$462

b.$396

c.$330

d.$440