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Balances and Transactions in Foreign Currencies (Tables) | 12 Months Ended
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Dec. 31, 2019
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Summary of Assets, Liabilities and Transactions in Foreign Currencies | As of December 31, 2019 and 2018, assets and liabilities denominated in foreign currencies, expressed in Mexican pesos (contractual amounts) are as follows:
|  | Assets |  |  | Liabilities |
Balances |  | Current |  |  | Non-current |  |  | Current |  |  | Non-current |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. dollars |  |  | 11,122 |  |  |  | 93 |  |  |  | 2,762 |  |  |  | 37,691 |
Euros |  |  | — |  |  |  | — |  |  |  | 49 |  |  |  | — |
As of December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. dollars |  |  | 14,572 |  |  |  | — |  |  |  | 2,985 |  |  |  | 43,411 |
Euros |  |  | — |  |  |  | — |  |  |  | 93 |  |  |  | — |
For the years ended December 31, 2019, 2018 and 2017 transactions denominated in foreign currencies, expressed in Mexican pesos (contractual amounts) are as follows:
Transactions |  | Revenues |  |  | Purchases of Raw Materials |  |  | Interest Expense |  |  | Other |
Year ended December 31, 2019 U.S. dollars |  |  | 1,506 |  |  |  | 14,307 |  |  |  | 1,910 |  |  |  | 2,723 |
Year ended December 31, 2019 Euros |  |  | — |  |  |  | 454 |  |  |  | — |  |  |  | — |
Year ended December 31, 2018 U.S. dollars |  |  | 1,481 |  |  |  | 18,129 |  |  |  | 2,223 |  |  |  | 2,161 |
Year ended December 31, 2018 Euros |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Year ended December 31, 2017 U.S. dollars |  |  | 653 |  |  |  | 13,381 |  |  |  | 2,454 |  |  |  | 1,544 |
Year ended December 31, 2017 Euros |  |  | — |  |  |  | 18 |  |  |  | — |  |  |  | — |

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