Shulman Inc. has the following data, in thousands. Assuming a 365-day year, what is the firm's cash conversion cycle? Annual sales = $45,000 Annual cost of goods sold = $30,000 Inventory = $4,500 Accounts receivable = $1,800 Accounts payable = $2,500 a. 39 days b. 28 days c. 35 days d. 43 days e. 32 days