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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Cash flows from operating activities: |  |
Net earnings | $ 385 | $ 255
Adjustments to reconcile net earnings to net cash provided by operating activities: |  |
Provision for credit losses | 4 | 4
Deferred income taxes and tax uncertainties | 7 | (11)
Depreciation and amortization | 52 | 43
Net gains from sale or redemption of assets | 0 | (5)
Stock-based compensation | 9 | 8
Change in operating assets and liabilities: |  |
Accounts receivable | (263) | (121)
Inventories | (65) | 52
Prepaid expenses and other assets | (39) | (5)
Trade accounts payable | 228 | 85
Accrued liabilities | (53) | (61)
Income taxes – net | 86 | 55
Other non-current liabilities | (8) | (5)
Net cash provided by operating activities | 343 | 294
Cash flows from investing activities: |  |
Additions to property, buildings, equipment and intangibles | (57) | (73)
Proceeds from sale or redemption of assets | 0 | 15
Net cash used in investing activities | (57) | (58)
Cash flows from financing activities: |  |
Proceeds from stock options exercised | 6 | 8
Payments for employee taxes withheld from stock awards | (2) | (2)
Purchases of treasury stock | (79) | (175)
Cash dividends paid | (84) | (81)
Net cash used in financing activities | (159) | (250)
Exchange rate effect on cash and cash equivalents | (4) | (9)
Net change in cash and cash equivalents | 123 | (23)
Cash and cash equivalents at beginning of year | 241 | 585
Cash and cash equivalents at end of period | $ 364 | $ 562

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