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12. Trade receivables (Details 1) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Trade Receivables Details 1Abstract |  |  |
Allowance for the impairment of trade receivables, beginning (previously stated) | $ 677,529 | $ 383,439 | $ 146,238
Change of accounting standard adjustment | 82,041 | 0 | 0
Allowance for the impairment of trade receivables, beginning | 759,570 | 383,439 | 146,238
Increase | 916,036 | 391,615 | 388,339
Decrease | (907,137) | (64,348) | (56,062)
Result from exposure to inflation | (467,214) | (33,177) | (95,076)
Allowance for the impairment of trade receivables, ending | $ 901,255 | $ 759,570 | $ 383,439

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