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16. Cash and cash equivalents (Tables) | 12 Months Ended
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Dec. 31, 2018
Cash And Cash Equivalents Tables Abstract |
Cash and cash equivalents |
|  | 12.31.18 |  | 12.31.17
Cash and banks |  | 27,608 |  | 122,349
Total cash and cash equivalents |  | 27,608 |  | 122,349

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