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v3.20.1

Personnel Expenses (Tables) | 12 Months Ended
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Dec. 31, 2019
Personnel Expenses |
Schedule of personnel expenses by function |
|  | Thousands of Euros
|  | 31/12/2019 |  | 31/12/2018 |  | 31/12/2017
Cost of sales |  | 988,689 |  | 810,512 |  | 731,192
Research and development |  | 106,472 |  | 93,817 |  | 90,495
Selling, general & administration expenses |  | 382,472 |  | 345,224 |  | 323,880
|  | 1,477,633 |  | 1,249,553 |  | 1,145,567
Schedule of personnel expenses by nature |
|  | Thousands of Euros
|  | 31/12/2019 |  | 31/12/2018 |  | 31/12/2017
Wages and salaries |  | 1,178,527 |  | 1,000,682 |  | 917,810
Contributions to pension plans (see note 29) |  | 29,941 |  | 21,363 |  | 20,347
Other social charges |  | 28,785 |  | 29,055 |  | 27,679
Social Security |  | 240,380 |  | 198,453 |  | 179,731
|  | 1,477,633 |  | 1,249,553 |  | 1,145,567

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