Susan Corp. purchased inventory as follows:

March 3		550 units at $17
March 4		330 units at $19
March 7		195 units at $21

On March 5, Susan sold 730 units for $17 each. The average unit cost to be used for the cost of goods sold on March 5, in a perpetual inventory system, is

$18.34.

$14.74.

$21.40.

$17.75.