Merchandise subject to the credit terms 2/10, n/30, FOB shipping point, is sold to a customer on account for $20,125. The seller issued a credit memorandum for $4,600 prior to payment. What is the amount of the cash discount allowable if the payment is made within 10 days of the invoice date?

a.$201.25

b.$248.75

c.$402.50

d.$310.50