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v3.20.1

Costs and expenses by nature: (Details) $ in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Sep. 20, 2017 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($)
Costs and expenses by nature: |  |  |  |
Short term benefits |  | $ 1,199,217 | $ 1,118,926 | $ 772,129
Electric power |  | 474,719 | 458,827 | 234,879
Maintenance and conservation |  | 699,557 | 673,603 | 401,479
Professional fees |  | 308,740 | 306,169 | 217,930
Insurance and bonds |  | 225,252 | 200,477 | 86,838
Surveillance services | $ 29.7 | 325,612 | 310,065 | 207,303
Cleaning services |  | 232,219 | 229,003 | 142,531
Technical assistance (Note 15.4) |  | 404,086 | 386,249 | 346,487
Right of use of assets under concession |  | 986,850 | 898,253 | 468,695
Amortization and depreciation of intangible assets, furniture and equipment |  | 1,836,897 | 1,760,741 | 1,166,114
Impairment of goodwill (Note 8.1) |  | 0 | 0 | 4,719,096
Consumption of commercial items |  | 323,899 | 300,845 | 252,602
Construction services (Note 3.1.3) |  | 1,236,193 | 935,774 | 1,898,550
Termination benefits (Note 18.17) |  | 1,922 | 1,595 | 1,984
Employees' statutory profit sharing |  | 10,250 | 8,052 | 6,359
Financial assets impairment |  |  | 0 | 45,687
Other |  | 279,649 | 177,330 | 144,322
Total aeronautical and non-aeronautical services costs, costs of construction services and administrative expenses |  | $ 8,545,062 | $ 7,765,909 | $ 11,112,985

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