Calculate the nominal annual cost of nonfree trade credit under each of the following terms. Assume that payment is made either on the due date or on the discount date. Assume 365 days in year for your calculations.

a. 1/15 net 20.

b. 2/10 net 50

c. 3/10 net 55

d. 2/10 net 55

e. 2/15 net 40