what is working ratio, current ratio, debt to asset ratio, return on equity, return on assets, days in inventory, accounts receivable turnover, times interest earned, free cash flow, gross profit rate, profit nargin, asset turnover? please show all the work and formulas used.

B c D Amazon Financial Statement Consolidated Statements of Operations - USD (S) shares in Millions, $ in Millions Dec. 31, 2020 Dec 31, 2019 Dec 31, 2018 $ 386,064 $ 280,522 $ 232,887 Total net sales Operating expenses Cost of sales Fulfillment Technology and content 233,307 58,517 42,740 165,536 40,232 35,931 139,156 34,027 28,837 Marketing 22,008 18,878 13,814 General and administrative Other operating expense (income), net Total operating expenses Operating income Interest income Interest expense Other Income (expense), net Total non-operating income (expense) 7 Income before income taxes 8 Provision for income taxes 9 Equity-method investment activity, net of tax 0 Net income 1 Basic earnings per share fin dollars per share) 22 Diluted earnings per share(in dollars per share) 3 Weighted-average shares used in computation of earnings per share: 24 Basic (in shares) Diluted in shares) 25 26 Net product sales 27 Total net sales 28 Net service sales 29 Total net sales 30 31 32 33 34 6,668 (75) 363,165 22,899 555 (1,647) 2,371 1,279 24,178 (2,863) 16 $ 21,331 $ 42.64 $ 41.83 5,203 201 265,981 14,541 832 (1,600) 203 (565) 13,976 (2,374) (14) $11,588 $ 23.46 $ 23.01 4,336 296 220,466 12,421 440 (1,417) (183) (1,160) 11,261 (1,197) 9 $ 10,073 $20.68 $ 20.14 500 510 494 504 487 500 $ 215,915 $ 160,408 $ 141,915 $ 170,149 $ 120,114 $ 90,972 H J 29 Consolidated Balance Sheets - USD ($)S in Millions Dec 31, 2020 Dec 31, 2019 Current assets: Cash and cash equivalents $ 42,122 $ 36,092 42,274 23,795 24,542 18,929 20,497 20,816 132,733 96,334 113,114 37,553 15,017 22,778 321,195 72,705 25,141 14,754 16,314 225,248 Marketable securities Inventories Accounts receivable, net and other 7 Total current assets 18 9 Property and equipment, net 10 Operating leases 11 Goodwill 12 Other assets 13 Total assets Current liabilities: Accounts payable Accrued expenses and other Unearned revenue Total current liabilities Long-term lease liabilities Long-term debt Other long-term liabilities Commitments and contingencies (Note 7) Stockholders' equity: Preferred stock. $0.01 par value: Authorized shares - 500 Issued and outstanding shares - none Common stock, $0.01 par value Authorized shares -5,000 Issued shares - 521 and 527 Outstanding shares 25 - 498 and 503 Treasury stock, at cost 27 Additional paid-in capital 28 Accumulated other comprehensive income (loss) 29 Retained earnings 30 Total stockholders' equity 31 Total liabilities and stockholders' equity 14 15 16 17 18 19 20 21 22 23 24 72,539 44,138 9,708 126,385 52,573 31,816 17,017 47,183 32,439 8,190 87,812 39,791 23,414 12,171 0 5 0 5 26 (1,837) 42,865 (180) 52,551 93,404 $ 321,195 (1,837) 33,658 (986) 31,220 62,060 $ 225,248 32 33 34 M N Dec 31, 2020 Dec 31, 2019 Dec 31, 2018 $36,410 $ 32,173 $ 21,856 21,331 11,588 10,073 25,251 21,789 15,341 Consolidated Statements of Cash Flows - USD ($) $ in Millions Statement of Cash Flows (Abstract] CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD OPERATING ACTIVITIES: Net Income Adjustments to reconcile net income to net cash from operating activities: Depreciation and amortization of property and equipment and capitalized content costs, operating lease assets, and other Stock-based compensation Other operating expense (income), net Other expense (income), net Deferred income taxes Changes in operating assets and liabilities: Inventories Accounts receivable, net and other Accounts payable Accrued expenses and other Uneamed revenue Net cash provided by (used in) operating activities INVESTING ACTIVITIES: Purchases of property and equipment Proceeds from property and equipment sales and incentives Acquisitions, net of cash acquired, and other Sales and maturities of marketable securities Purchases of marketable securities 9,208 (71) (2,582) (554) 6,864 164 (249) 5,418 274 219 441 796 (2,849) (8,169) 17480 5,754 1,265 66,064 (3,278) (7,681) 8,193 (1,383) 1,711 38,514 (1,314) (4,615) 3,263 472 1.151 30,723 (40,140) 5,096 (2,325) 50,237 (72,479) (16,861) 4,172 (2,461) 22,681 (31,812) (13,427) 2,104 (2,186) 8,240 (7,100) (59,611) (24,281) (12,369) 1,402 (1,518) Net cash provided by (used in) Investing activities FINANCING ACTIVITIES: Proceeds from short-term debt, and other Repayments of short-term debt and other Proceeds from long-term debt Repayments of long-term debt Principal repayments of finance leases Principal repayments of financing obligations Net cash provided by (used in) financing activities Foreign currency effect on cash, cash equivalents, and restricted cash 871 6,796 (6,177) 10,525 (1,553) (10,642) (53) (1,104) 618 (1,166) (9,628) (27) (10,066) 70 886 (813) 182 (155) (7449) (337) (7,686) (351) Net increase (decrease) in cash, cash equivalents, and restricted cash CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD 5,967 $ 42,377 4,237 $36,410 10,317 $ 32,173