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Cost of sales | 12 Months Ended
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Dec. 31, 2019
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Cost of sales |
32 | Cost of sales
Cost of sales is analysed as follows:
|  | 2019 |  |  | 2018 |  |  | 2017 |
Opening inventories |  |  | 84,227 |  |  |  | 91,077 |  |  |  | 91,014 |
Purchases |  |  | 139,205 |  |  |  | 177,591 |  |  |  | 180,872 |
Labour costs |  |  | 86,209 |  |  |  | 89,827 |  |  |  | 92,330 |
Third party manufacturers costs |  |  | 3,919 |  |  |  | 6,039 |  |  |  | 8,725 |
Other manufacturing costs |  |  | 29,519 |  |  |  | 29,004 |  |  |  | 37,605 |
Government grants related to PPE |  |  | (1,463 | ) |  |  | (1,061 | ) |  |  | (1,068 | )
Closing inventories |  |  | (69,685 | ) |  |  | (84,227 | ) |  |  | (91,077 | )
Total |  |  | 271,931 |  |  |  | 308,250 |  |  |  | 318,401 |
The line item “Other manufacturing costs” includes the depreciation expenses of property plant and equipment used in the production of finished goods. The depreciation expenses amount to 11,709, 7,455 and 8,565 for the years ended December 31, 2019, 2018 and 2017, respectively.

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- Definition The disclosure of the cost of sales. [Refer: Cost of sales] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard -URIDate 2019-03-27 + Details
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