Beacon Food Stores purchased canned goods at an invoice price of $6,400 and terms of 2/10, n/30. Half of the goods had been mislabeled and were returned immediately to the supplier. If Beacon Food pays the remaining amount of the invoice within the discount period, the amount paid should be:

A.$3,136.

B.$6,272.

C.$3,072.

D.$6,400.