A company purchased 300 units for $20 each on January 31. It purchased 100 units for $30 each on February 28. It sold a total of 160 units for $90 each from March 1 through December 31. If the company uses the lastin, firstout inventory costingmethod, calculate the cost of ending inventory on December 31.(Assume that the company uses a perpetual inventorysystem.)

A.

$7,200

B.

$240

C.

$16,800

D.

$4,800