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Inventories | 12 Months Ended
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Dec. 31, 2018
Inventories |
Inventories | 9. Inventories An analysis of inventories at December 31, 2018, 2017 and 2016 is as follows:
|  | 2018 |  | 2017 |  | 2016
Spare parts and accessories of flight equipment |  | Ps. | 289,737 |  | Ps. | 285,185 |  | Ps. | 235,330
Miscellaneous supplies |  |  | 7,534 |  |  | 9,665 |  |  | 8,554
|  | Ps. | 297,271 |  | Ps. | 294,850 |  | Ps. | 243,884
The inventory items are consumed during or used mainly in delivery of in-flight services and for maintenance services by the Company and are valued at the lower of cost or replacement value. During the years ended as of December 31, 2018, 2017 and 2016, the amount of consumption of inventories, recorded as an operating expense as part of maintenance expense was Ps.290,206, Ps.242,265 and Ps.186,719, 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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