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Gains (losses) from operating activities in the statement of income by function of expenses, included according to their nature (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Total | $ 1,394,822 | $ 1,328,285 | $ 1,185,583
Cost of Sales [Member] |  |  |
Cost of Raw Meterial And Suppiles | (413,283) | (335,192) | (309,103)
Personnel expenses | (172,159) | (162,335) | (127,556)
Depreciation expense | (232,365) | (271,239) | (305,091)
Amortization expense | (2,921) | (3,210) | (3,469)
Small deposit amortization expense | (5,440) | (9,498) | (2,287)
Inventory provision variation | (14,989) | (926) | 2,597
Operating leases | (96,094) | (90,325) | (62,599)
Investment plan expenses | (13,956) | (16,624) | (17,574)
Maintenance and repair | (5,306) | (6,051) | (3,956)
Contractors, | (67,337) | (62,300) | (49,862)
Mining concessions | (7,802) | (7,313) | (12,888)
Operations transport | (54,057) | (45,864) | (37,809)
Freight and product transport costs | (131,729) | (132,260) | (96,295)
Packaging costs | (2,402) | (1,712) | (4,244)
Purchases from third parties | (113,898) | (125,456) | (120,040)
Insurance policies | (11,199) | (12,110) | (7,620)
CORFO right | (46,274) | (41,962) | (23,155)
Other expenses, by nature | (3,611) | (3,908) | (4,632)
Total | $ (1,394,822) | $ (1,328,285) | $ (1,185,583)

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- Definition The amount of 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_103&doctype=Standard -URIDate 2017-03-09 + Details
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