The classes of revenue for the year then ended as of December 31, 2017, 2016 and 2015 are included below:
| From January 1 | From January 1 | From January 1 | ||||||||||
| Classes of revenue | to December 31, 2017 |
to December 31, 2016 |
to December 31, 2015 |
|||||||||
| ThCh$ | ThCh$ | ThCh$ | ||||||||||
| Sale of goods | 640,419,045 | 655,311,727 | 632,371,393 | |||||||||
| Rendering of services | 3,365,642 | 3,135,894 | 3,822,681 | |||||||||
| Total | 643,784,687 | 658,447,621 | 636,194,074 | |||||||||