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Inventories, net | 12 Months Ended
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Dec. 31, 2018
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Inventories, net | 8. Inventories, net 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 |
For the years ended December 31, 2016, 2017 and 2018, the cost of inventories recognized in cost of sales was Ps. 172,495,376, Ps. 170,154,336 and Ps. 180,013,986 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 2018-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2018-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2018-03-16 + Details
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