What has happened to the companys operating margin, profit margin, return on assets, and return on equity?

September 25, 2021 September 26, 2020 ASSETS: S Current assets: Cash and cash equivalents Marketable securities Accounts receivable, net Inventories Vendor non-trade receivables Other current assets Total current assets 34,940 $ 27,699 26,278 6,580 25,228 14,111 134,836 38,016 52,927 16,120 4,061 21,325 11,264 143,713 Non-current assets: Marketable securities Property, plant and equipment, net Other non-current assets Total non-current assets Total assets 127,877 39,440 48,849 216,166 351,002 $ 100,887 36,766 42,522 180,175 323,888 $ LIABILITIES AND SHAREHOLDERS' EQUITY: $ Current liabilities: Accounts payable Other current liabilities Deferred revenue Commercial paper Term debt Total current liabilities 54,763 $ 47,493 7,612 6,000 9,613 125,481 42,296 42,684 6,643 4,996 8,773 105,392 Non-current liabilities: Term debt Other non-current liabilities Total non-current liabilities Total liabilities 109, 106 53,325 162,431 287,912 98,667 54,490 153,157 258,549 Commitments and contingencies Shareholders' equity: Common stock and additional paid-in capital, $0.00001 par value: 50,400,000 shares authorized; 16,426,786 and 16,976,763 shares issued and outstanding, respectively Retained earnings Accumulated other comprehensive income/(loss) Total shareholders' equity Total liabilities and shareholders' equity 57,365 5,562 163 63,090 351,002 $ 50,779 14,966 (406) 65,339 323,888 $ See accompanying Notes to Consolidated Financial Statements. Apple Inc. CONSOLIDATED STATEMENTS OF OPERATIONS (In millions, except number of shares which are reflected in thousands and per share amounts) September 25, 2021 Years ended September 26, 2020 September 28, 2019 Net sales: Products Services Total net sales 297,392 $ 68,425 365,817 220,747 $ 53,768 274,515 213,883 46,291 260,174 Cost of sales: Products Services Total cost of sales Gross margin 192,266 20,715 212,981 152,836 151,286 18,273 169,559 104,956 144,996 16,786 161,782 98,392 16,217 Operating expenses: Research and development Selling, general and administrative Total operating expenses 21,914 21,973 43,887 18,752 19,916 38,668 18,245 34,462 Operating income Other income/(expense), net Income before provision for income taxes Provision for income taxes Net income 108,949 258 109,207 14,527 94,680 $ 66,288 803 67,091 9,680 57,411 $ 63,930 1,807 65,737 10,481 55,256 $ Earnings per share: Basic Diluted $ 3.31 $ 5.67 $ 5.61 $ 2.99 2.97 $ 3.28 $ Shares used in computing earnings per share: Basic Diluted 16,701,272 16,864,919 17,352,119 17,528,214 18,471,336 18,595,651 See accompanying Notes to Consolidated Financial Statements