4. B&B Doctors of the Bronx had the following selected account balances at the year-end: Amounts in thousands Patient revenue $135,000 Cost of goods sold 90,000 Net income 17,000 Supplies 10,400 Accounts Receivable 13,500 Accounts payable 10,000 How many days, on average, does it take B&B Doctors to pay its outstanding accounts payable? A. 11.6 days B. 32.1 days c. 40.5 days D. 55.5 days