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COSTS AND EXPENSES BY NATURE

12 Months Ended

Dec. 31, 2017

Material income and expense [abstract]

NOTE 27 - COSTS AND EXPENSES BY NATURE

(a)	Costs and operating expenses

The main operating costs and administrative expenses are detailed below:

	For the periods ended
	December 31,
	2017		2016		2015
	ThUS$		ThUS$		ThUS$

Aircraft fuel		2,318,816		2,056,643		2,651,067
Other rentals and landing fees		1,172,129		1,077,407		1,109,826
Aircraft rentals		579,551		568,979		525,134
Aircraft maintenance		430,825		366,153		437,235
Comissions		252,474		269,296		302,774
Passenger services		288,662		286,621		295,439
Other operating expenses		1,381,546		1,424,595		1,293,320
Total		6,424,003		6,049,694		6,614,795

(b)	Depreciation and amortization

Depreciation and amortization are detailed below:

	For the period ended
	December 31,
	2017		2016		2015
	ThUS$		ThUS$		ThUS$

Depreciation (*)		943,215		910,071		897,670
Amortization		58,410		50,257		36,736
Total		1,001,625		960,328		934,406

(*) Include the depreciation of Property, plant and equipment and the maintenance cost of aircraft held under operating leases. The amount of maintenance cost included within the depreciation line item at December 31, 2017 is ThUS$ 359,940 and ThUS$ 345,651 for the same period of 2016.

(c)	Personnel expenses

The costs for personnel expenses are disclosed in Note 23 liability for employee benefits.

(d)	Financial costs

The detail of financial costs is as follows:

	For the period ended
	December 31,
	2017		2016		2015
	ThUS$		ThUS$		ThUS$

Bank loan interest		347,551		352,405		331,511
Financial leases		37,522		32,573		42,855
Other financial instruments		8,213		31,358		38,991
Total		393,286		416,336		413,357

Costs and expenses by nature presented in this note plus the Employee expenses disclosed in Note 23, are equivalent to the sum of cost of sales, distribution costs, administrative expenses, other expenses and financing costs presented in the consolidated statement of income by function.