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Employee benefits expenses (Details 1) - PEN (S/) S/ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Employee Benefits Expenses |  |  |
Cost of sales, note 18 | S/ 76,523 | S/ 90,139 | S/ 67,681
Administrative expenses, note 19 | 94,437 | 100,059 | 94,129
Selling and distribution expenses, note 20 | 17,982 | 17,096 | 16,230
Total employee benefits expenses | S/ 188,942 | S/ 207,294 | S/ 178,040

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