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Cost of sales and expenses by their nature

12 Months Ended

Dec. 31, 2020

Expenses by nature [abstract]

Cost of sales and expenses by their nature

19.

Cost of sales and expenses by their nature

At the years ended at December 31, 2020, 2019 and 2018, the cost of sales and administration expenses consist of the following:

	2 0 2 0			2 0 1 9			2 0 1 8

Raw materials and consumables	$	16,343,140		$	16,411,788		$	15,565,242
Electrical energy		2,820,667			3,303,640			2,536,387
Ferroalloys		1,617,352			2,137,671			1,973,586
Refractories		629,758			707,214			613,563

Oxygen		248,029			276,648			279,272
Electrodes		434,265			1,293,096			1,463,091
Gas and fuels		767,823			962,001			766,163
Labor		1,831,225			2,042,433			3,181,556
Operation materials		1,033,597			919,893			954,415
Depreciation and amortization		1,452,271			1,108,629			1,112,418
Maintenance		1,262,728			2,221,595			2,243,255
Other expenses		2,790,197			319,958			954,379
	$	31,231,052		$	31,704,566		$	31,643,327

	2 0 2 0			2 0 1 9			2 0 1 8

Cost of sales	$	29,211,724		$	30,067,141		$	30,563,315
Administrative expenses		2,019,328			1,637,425			1,080,012
	$	31,231,052		$	31,704,566		$	31,643,327