Ingram Office Supplies, Inc., buys on terms of 2/15, net 50 days. It does not take discounts, and it typically pays on time, 50 days after the invoice date. Net purchases amount to $800,000 per year. On average, what is the dollar amount of costly trade credit (total credit free credit) the firm receives during the year? (Assume a 365-day year, and note that purchases are net of discounts.)

a. $76,712

b. $83,616

c. $91,288

d. $93,589

e. $79,781