An Invoice for $10,000 Dated September 10 with Terms 3/10

Multiple Choice

An invoice for $10,000 dated September 10 with terms 3/10, 1½/20, n/30, EOM is received in the mail on September 25. A payment is sent on October 11 for $4,000. What is the outstanding balance?

A) $5,940.00
B) $6,000.00
C) $5,918.37
D) $5,939.08
E) $5,920.00