Access the September 30, 2017, 10-K report for Apple, Inc. (ticker: AAPL), filed on November 3, 2017, from the EDGAR filings at SEC.gov.

Required
1. What products are manufactured by Apple?
2. What inventory method does Apple use?
3. Compute its gross margin and gross margin ratio for the 2017 fiscal year. Comment on your computations—assume an industry average of 40% for the gross margin ratio.
4. Compute its inventory turnover and days’ sales in inventory for the year ended September 30, 2017. Comment on your computations—assume an industry average of 15 for inventory turnover and 9 for days’ sales in inventory.