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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Revenue |  |
Metal sales | $ 3,497.3 | $ 3,212.6
Cost of sales |  |
Production cost of sales | 1,778.9 | 1,860.5
Depreciation, depletion and amortization | 731.3 | 772.4
Reversals of impairment charges | (361.8) |
Total cost of sales | 2,148.4 | 2,632.9
Gross profit | 1,348.9 | 579.7
Other operating expense | 108.5 | 137.0
Exploration and business development | 113.5 | 109.2
General and administrative | 135.8 | 133.0
Operating earnings | 991.1 | 200.5
Other income - net | 72.6 | 3.2
Equity in earnings (losses) of joint ventures, net | 0.1 | (0.3)
Finance income | 7.9 | 11.0
Finance expense | (107.9) | (101.2)
Earnings before tax | 963.8 | 113.2
Income tax expense - net | (246.7) | (138.8)
Net earnings (loss) | 717.1 | (25.6)
Net earnings (loss) attributable to: |  |
Non-controlling interest | (1.5) | (2.0)
Common shareholders | $ 718.6 | $ (23.6)
Earnings (loss) per share attributable to common shareholders |  |
Basic | $ 0.57 | $ (0.02)
Diluted | $ 0.57 | $ (0.02)
Weighted average number of common shares outstanding |  |
Basic | 1,252,316 | 1,249,495
Diluted | 1,262,344 | 1,249,495

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- Definition The amount of expense relating to selling, general and administrative activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_23_g&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_28_e&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 82 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82_c&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2019-01-01 -Paragraph 70 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2019-en-r&anchor=para_70_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of exploration and business development cost. + References No definition available. + Details
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- Definition The amount of production costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories + References No definition available. + Details
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