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Inventories, net (Tables) | 12 Months Ended
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Dec. 31, 2019
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Summary of Analysis of Inventories | An analysis of inventories at December 31, 2018 and 2019 is as follows:
|  | 2018 |  |  | 2019 |
Mobile phones, accessories, computers, TVs, cards and other materials |  | Ps. | 43,723,492 |  |  | Ps. | 43,954,616 |
Less: Reserve for obsolete and slow-moving inventories |  |  | (3,418,130 | ) |  |  | (2,852,604 | )
Total |  | Ps. | 40,305,362 |  |  | Ps. | 41,102,012 |

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