Burlingame Carpets received a cheque for $8000 on December 10 from Sorenson Flooring as partial payment of

Question:

Burlingame Carpets received a cheque for $8000 on December 10 from Sorenson Flooring as partial payment of Burlingame’s invoice. The invoice, dated November 20, was for $14,772 with terms 2/10, 1/20, n/45, EOM.
a. How much should Burlingame credit Sorenson’s account?
b. What is the balance still owed?