Hyper Retail Outlets sell goods on terms of net 40. The store's average monthly sales (all on credit) are $70,000. Hyper pledges all of its receivables to the bank, which advances 80% of the face value of the receivables at a rate of 2.5% above prime. The bank also charges a 1% processing fee on all receivables pledged. Hyper borrows the full amount possible, and the current prime rate is 5%. What is the annual percentage rate (APR) of using this source of financing for one full year?

A. 23.5%

B. 21.8%

C. 19.1%

D. 18.75%