Operating Expenses, Depreciation and Amortization

12 Months Ended

Dec. 31, 2020

6)	OPERATING EXPENSES, DEPRECIATION AND AMORTIZATION

Consolidated operating expenses during 2020, 2019 and 2018 by function are as follows:


		2020		2019		2018
Administrative expenses 1	$		1,076		1,112		1,130
Selling expenses			337		371		312
Distribution and logistics expenses			1,423		1,489		1,537

	$		2,836		2,972		2,979

1	All significant R&D activities are executed by several internal areas as part of their daily activities. In 2020, 2019 and 2018, total combined expenses of these departments recognized within administrative expenses were $31, $38 and $39, respectively.

Depreciation and amortization recognized during 2020, 2019 and 2018 are detailed as follows:


		2020		2019		2018
Included in cost of sales	$		921		865		853
Included in administrative, selling and distribution and logistics expenses			196		180		129

	$		1,117		1,045		982