need answers A.? B.? Thanks

Southern Manufacturing is doing some short-term financial planning because they'd like to lower their short-term borrowing costs. a. Calculate the length of the cash conversion cycle for a firm with $25,000 in average inventory, $70,000 in average receivables, $20,000 in average payables, annual sales of $800,000, and an annual cost of goods sold of 80% of sales. (4 marks) b. What strategies could Southern undertake to improve their cash conversion cycle (2 marks)