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Inventories, net | 12 Months Ended
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Dec. 31, 2019
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Inventories, net | 8. Inventories, net 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 |
For the years ended December 31, 2017, 2018 and 2019, the cost of inventories recognized in cost of sales was Ps. 170,154,336, Ps. 180,013,986 and Ps. 174,543,602 , respectively.

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2019-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2019-en-r&doctype=Standard&dita_xref=IAS02_g36-39_TI -URIDate 2019-03-27 + Details
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