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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Inventories |
|  | December 31, 2017 |  |  | December 31, 2016 |
Finished products |  | Ps. | 25,374 |  |  | Ps. | 22,709 |
Raw materials |  |  | 5,194 |  |  |  | 5,156 |
Spare parts |  |  | 2,102 |  |  |  | 2,401 |
Work in process |  |  | 198 |  |  |  | 144 |
Inventories in transit |  |  | 1,437 |  |  |  | 1,188 |
Other |  |  | 535 |  |  |  | 334 |
|  | Ps. | 34,840 |  |  | Ps. | 31,932 |
Summary of Changes in Inventories | For the years ended at 2017, 2016 and 2015, changes in inventories are comprised as follows and included in the consolidated income statement under the cost of goods sold caption:
|  |  |  |  | 2017 |  |  | 2016 |  |  | 2015 |
Changes in inventories of finished goods and work in progress |  |  |  |  |  | Ps. | 196,547 |  |  | Ps. | 172,554 |  |  | Ps. | 132,835 |
Raw materials and consumables used |  |  |  |  |  |  | 85,568 |  |  |  | 63,285 |  |  |  | 53,514 |
Total |  |  |  |  |  | Ps. | 282,115 |  |  | Ps. | 235,839 |  |  | Ps. | 186,349 |

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