If you could indicate the numbers used for the answers so that I can learn how to work the problems on my own. Thanks

The following summarized data (amounts in millions) are taken from the September 27, 2008, and September 29, 2007, comparative financial statements of Apple Inc., a manufacturer of personal computers, portable digital music players, and mobile communications devices, along with a variety of related software, services, peripherals, and networking solutions. (Amounts Expressed in Millions) For the Fiscal Years Ended September 27 and September 29, respectively Net sales Costs of sales Operating income Net income At Year End Assets Cash and cash equivalents Short-term investments Accounts receivable, net Inventories Deferred tax assets Other current assets Property, plant, and equipment, net Goodwill Acquired intangible assets, net Other assets Total assets Liabilities and Shareholders' Equity Accounts payable Accrued expenses Non-current liabilities Common stock, no par value Retained earnings Accumulated other comprehensive income Total liabilities and shareholders' equity 2008 2007 $ 33,679 $ 25,806 19,834 14,152 6,285 4,399 $ 4,784 $ 3,426 $ 12,175 $ 10,852 12,655 6,064 2,442 1,727 699 396 1,527 792 5,852 3,965 2,485 2,032 218 49 302 314 2,085 1,402 $ 40,440 $ 27,593 $ 5,460 $ 4,940 8,512 4,300 4,250 1,495 7,177 5,348 15,033 11,459 8 51 $ 40,440 $ 27,593 At September 30, 2006, total assets were $17,275 and total shareholders' equity was $9,884. Required: (a) Calculate Apple Inc.'s working capital, current ratio, and acid-test ratio at September 27, 2008, and September 29, 2007. (Round your ratio answers to 1 decimal place. Enter working capital in million of dollars. Omit the "$" sign in your response.) 2008 Working capital Current ratio Acid-test ratio 2007 $ $ (b) Calculate Apple's ROE for the years ended September 27, 2008, and September 29, 2007. (Round your answers to 1 decimal place. Omit the "%" sign in your response.) 2008 2007 ROE % % (c) Calculate Apple's ROI, showing margin and turnover, for the years ended September 27, 2008, and September 29, 2007. (Round your turnover calculations to two decimal places. Round your margin and ROI percentages to one decimal place. Omit the "%" sign in your response.) 2008 ROI Margin Turnover 2007 % % % %