A company turns its inventory 9 times per year. The company's monthly sales total $62.8 million and they all are on credit. Accounts receivable are $99,720,000 and accounts payable are $47,080,000. The monthly cost of goods sold is $44,900,000. What is the company's cash conversion cycle?

a. 9

b. 57

c. 25

d. 32

e. 40