| 31.12.2015 | 31.12.2014 |
Amortization and depreciation |
(790 375) |
(728 408) |
Costs of employee benefits |
(989 489) |
(948 872) |
- salaries and wages |
(723 197) |
(718 901) |
- social security and other benefits |
(266 292) |
(229 971) |
Consumption of materials, raw materials, value of goods and materials sold |
(1 791 115) |
(1 821 196) |
- consumption of materials and energy |
(1 575 626) |
(1 607 937) |
- cost of goods and materials sold |
(102 281) |
(208 745) |
- cost of gas |
(113 208) |
(4 514) |
Cost of energy and gas purchased for resale |
(3 282 923) |
(3 835 730) |
External services |
(1 192 707) |
(1 046 916) |
- transmission services |
(769 503) |
(710 577) |
- other external services |
(423 204) |
(336 339) |
Taxes and charges |
(290 201) |
(268 934) |
Total costs of products, goods and materials sold, selling, marketing, general and administrative expenses |
(8 336 810) |
(8 650 056) |