The following summarized data (amounts in millions) are taken from the September 30, 2017, and September 24, 2016, comparative financial statements of Apple Inc., a company that designs, manufactures, and markets mobile communication and media devices and personal computers; sells a variety of related software, services, accessories, networking solutions, and offers third-party digital content and applications: (Amounts Expressed in Millions) For the Fiscal Years Ended September 30 and September 24, respectively: 2017 2016 Net sales $ 229, 234 $215,639 Costs of sales 114,048 131,376 Operating income 61,344 68,024 Net income $ 48,351 $ 45,687 At Year End: Assets Current assets: Cash and cash equivalents $ 20,289 $ 20,484 Short-term marketable securities 53,892 46, 671 Accounts receivable, less allowance of $58 and $53, respectively 17,874 15,754 Inventories 4,855 2,132 Vendor nontrade receivables 17,799 13,545 Other current assets 13,936 8,283 Total current assets 128,645 106,869 Long-term marketable securities 194,714 170, 430 Property, plant, and equipment, net 33,783 27,010 Goodwill 5,717 5,414 Acquired intangible assets, net 2,298 3,206 Other assets 10,162 8,757 Total assets $ 375, 319 $ 321,686 Liabilities and Shareholders' Equity Current liabilities: Accounts payable $ 49,049 $ 37, 294 Accrued expenses 25, 744 22,027 Deferred revenue 7,548 8,080 Commercial paper 11,977 8,105 Current portion of long-term debt 6,496 3,500 Total current liabilities 100,814 79,006 Deferred revenue-noncurrent 2,836 2,930 Long-term debt 97,207 75,427 Other noncurrent liabilities 40,415 36,074 Total liabilities 241, 272 193,437 Shareholders' Equity: Common stock and additional paid-in capital, $0.68001 par value, 12,600,000 shares authorized; 5, 126,201 and 5,336,166 shares issued and outstanding, recnertively 75 867 21.251 Accumulated other comprehensive income (loss) Total shareholders' equity Total liabilities and shareholders' equity 98,330 96,364 (150) 634 134,947 128,249 $375,319 $ 321,686 At September 26, 2015, total assets were $290,345 and total shareholders' equity was $119,355. Required: a. Calculate Apple Inc.'s working capital, current ratio, and acid-test ratio at September 30, 2017, and September 24, 2016. b. Calculate Apple's ROE for the years ended September 30, 2017, and September 24, 2016. c. Calculate Apple's ROI, showing margin and turnover, for the years ended September 30, 2017, and September 24, 2016. Complete this question by entering your answers in the tabs below. Required A Required B Required C Calculate Apple's ROE for the years ended September 30, 2017, and September 24, 2016. (Round your answers to 1 decimal place.) 2017 2016 ROE % Retained earnings Accumulated other comprehensive income (loss) Total shareholders' equity Total liabilities and shareholders' equity (150) 134,047 $ 375,319 634 128, 249 $ 321,686 At September 26, 2015, total assets were $290,345 and total shareholders' equity was $119,355. Required: a. Calculate Apple Inc.'s working capital, current ratio, and acid-test ratio at September 30, 2017, and September 24, 2016. b. Calculate Apple's ROE for the years ended September 30, 2017, and September 24, 2016. c. Calculate Apple's ROI, showing margin and turnover, for the years ended September 30, 2017, and September 24, 2016. Complete this question by entering your answers in the tabs below. Required A Required B Required C Calculate Apple's ROI, showing margin and turnover, for the years ended September 30, 2017, and September 24, 2016. (Round "Turnover" answers to 2 decimal places. Round your percentage answers to 1 decimal place.) 2017 2016 ROI Margin Turnover % % % %