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10 Expenses by nature (Tables) | 12 Months Ended
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Dec. 31, 2020
Expenses By Nature |
Schedule of expenses by nature | The detail of expenses by nature is as follows:
Expenses by nature at 12.31.20
Description |  | Transmission and distribution expenses |  | Selling expenses |  | Administrative expenses |  | Total
Salaries and social security taxes |  | 7,756 |  | 1,287 |  | 2,272 |  | 11,315
Pension plans |  | 327 |  | 54 |  | 96 |  | 477
Communications expenses |  | 218 |  | 444 |  | - |  | 662
Allowance for the impairment of trade and other receivables |  | - |  | 4,183 |  | - |  | 4,183
Supplies consumption |  | 1,878 |  | - |  | 148 |  | 2,026
Leases and insurance |  | 1 |  | 1 |  | 315 |  | 317
Security service |  | 306 |  | 32 |  | 35 |  | 373
Fees and remuneration for services |  | 3,900 |  | 2,169 |  | 1,534 |  | 7,603
Public relations and marketing |  | - |  | 19 |  | - |  | 19
Advertising and sponsorship |  | - |  | 10 |  | - |  | 10
Reimbursements to personnel |  | - |  | - |  | 1 |  | 1
Depreciation of property, plants and equipments | 5,118 |  | 762 |  | 626 |  | 6,506
Depreciation of right-of-use asset | 32 |  | 64 |  | 225 |  | 321
Directors and Supervisory Committee members’ fees | - |  | - |  | 28 |  | 28
ENRE penalties |  | 330 |  | 365 |  | - |  | 695
Taxes and charges |  | - |  | 1,453 |  | 64 |  | 1,517
Other |  | - |  | - |  | 9 |  | 9
At 12.31.20 |  | 19,866 |  | 10,843 |  | 5,353 |  | 36,062
| (1) | Includes recovery of technical service quality-related penalties of six-month control periods Nos. 47 and 48 for $ 700.8 million, due to the fact that quality levels were better than estimated.
Expenses by nature at 12.31.19
Description |  | Transmission and distribution expenses |  | Selling expenses |  | Administrative expenses |  | Total
Salaries and social security taxes |  | 8,666 |  | 1,424 |  | 1,819 |  | 11,909
Pension plans |  | 260 |  | 43 |  | 54 |  | 357
Communications expenses |  | 113 |  | 504 |  | 23 |  | 640
Allowance for the impairment of trade and other receivables |  | - |  | 1,844 |  | - |  | 1,844
Supplies consumption |  | 2,200 |  | - |  | 156 |  | 2,356
Leases and insurance |  | - |  | - |  | 308 |  | 308
Security service |  | 323 |  | 58 |  | 126 |  | 507
Fees and remuneration for services |  | 3,481 |  | 2,203 |  | 1,856 |  | 7,540
Public relations and marketing |  | - |  | 56 |  | - |  | 56
Advertising and sponsorship |  | - |  | 29 |  | - |  | 29
Reimbursements to personnel |  | - |  | - |  | 1 |  | 1
Depreciation of property, plants and equipments | 4,952 |  | 738 |  | 605 |  | 6,295
Depreciation of right-of-use asset |  | 22 |  | 45 |  | 156 |  | 223
Directors and Supervisory Committee members’ fees | - |  | - |  | 30 |  | 30
ENRE penalties |  | 1,963 |  | 1,806 |  | - |  | 3,769
Taxes and charges |  | - |  | 1,257 |  | 68 |  | 1,325
Other |  | - |  | - |  | 21 |  | 21
At 12.31.19 |  | 21,980 |  | 10,007 |  | 5,223 |  | 37,210
Expenses by nature at 12.31.18
Description |  | Transmission and distribution expenses |  | Selling expenses |  | Administrative expenses |  | Total
Salaries and social security taxes |  | 9,066 |  | 1,627 |  | 1,914 |  | 12,607
Pension plans |  | 169 |  | 30 |  | 36 |  | 235
Communications expenses |  | 170 |  | 564 |  | 34 |  | 768
Allowance for the impairment of trade and other receivables |  | - |  | 2,046 |  | - |  | 2,046
Supplies consumption |  | 1,654 |  | - |  | 257 |  | 1,911
Leases and insurance |  | 1 |  | - |  | 377 |  | 378
Security service |  | 286 |  | 4 |  | 269 |  | 559
Fees and remuneration for services |  | 2,956 |  | 2,177 |  | 2,108 |  | 7,241
Public relations and marketing |  | - |  | - |  | 67 |  | 67
Advertising and sponsorship |  | - |  | - |  | 35 |  | 35
Reimbursements to personnel |  | - |  | - |  | 1 |  | 1
Depreciation of property, plants and equipments | 4,217 |  | 629 |  | 516 |  | 5,362
Directors and Supervisory Committee members’ fees | - |  | - |  | 46 |  | 46
ENRE penalties |  | 4,321 |  | 2,202 |  | - |  | 6,523
Taxes and charges |  | - |  | 1,254 |  | 340 |  | 1,594
Other |  | 2 |  | 1 |  | 12 |  | 15
At 12.31.18 |  | 22,842 |  | 10,534 |  | 6,012 |  | 39,388

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