A Company Purchased 400 Units for $20 Each on January

A company purchased 400 units for $20 each on January 31.It purchased 520 units for $26 each on February 28.It sold a total of 560 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) $9,360
B) $4,960
C) $7,200
D) $2,240