A Company Purchased 300 Units for $30 Each on January

A company purchased 300 units for $30 each on January 31.It purchased 360 units for $36 each on February 28.It sold a total of 460 units for $40 each from March 1 through December 31.What is the amount of ending inventory on December 31 if the company uses the first-in,first-out (FIFO) inventory costing method? (Assume that the company uses a perpetual inventory system. )

A) $7,200
B) $5,360
C) $6,000
D) $640