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Inventories, net (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Analysis of Inventories | An analysis of inventories at December 31, 2017 and 2018 is as follows:
|  | 2017 |  |  | 2018 |
Mobile phones, accessories, computers, TVs, cards and other materials |  |  | Ps. 42,262,511 |  |  |  | Ps. 43,723,492 |
Less: Reserve for obsolete and slow-moving inventories |  |  | (3,452,946 | ) |  |  | (3,418,130 | )
Total |  |  | Ps. 38,809,565 |  |  |  | Ps. 40,305,362 |

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