A company purchased $2,500 of merchandise on July 5 with terms 3/10, 1/30. On July 7. It returned $275 worth of merchandise. On July 8, it paid the full amount due. The amount of the case paid on July 8 equals:
A. $2,1S8.
B. $2,150.
C. $2,500.
D. $275
E. $2.225