You purchase used furniture from a bankrupt company for an agreed price of $12,000 with payment terms of 120 days. You have a revolving credit line with a 9% APR. The seller has offered a 4% discount if you agree to pay in advance (prepayment). Please calculate:

a) Nominal % cost of trade credit:

b) $ cost of financing the prepayment for 120 days with the revolving credit line:

c) $ discount amount: