2017 | 2016 | 2015 | ||||||||||
Profit (loss) before taxes | $ | 1,846,311 | $ | (775,179 | ) | $ | (301,930 | ) | ||||
Income tax | (553,893 | ) | 232,554 | 90,579 | ||||||||
(Decrease) increase from: | ||||||||||||
Difference in depreciation and amortization | 503,479 | 48,701 | (232,397 | ) | ||||||||
Revaluation surplus | 265,723 | 132,019 | 320,467 | |||||||||
Income recognized in advance | (1,678 | ) | (8,261 | ) | (11,409 | ) | ||||||
Materials and supplies | 5,503 | (15,673 | ) | (14,497 | ) | |||||||
Inflationary and currency exchange effects on monetary assets and liabilities, net | (203,983 | ) | (102,928 | ) | (87,765 | ) | ||||||
Tax losses – net | (1,255,433 | ) | 116,906 | (498,884 | ) | |||||||
Provisions and allowance for doubtful accounts | (183,963 | ) | (63,803 | ) | (143,685 | ) | ||||||
Difference between the tax and book value for the sale of assets | (435 | ) | (60,277 | ) | (49,084 | ) | ||||||
Difference between the tax and book value for the sale of shares | 956,613 | 20,136 | 7,902 | |||||||||
Non-deductible expenses | (48,665 | ) | (30,759 | ) | (79,702 | ) | ||||||
Provision for income tax | $ | (516,732 | ) | $ | 268,615 | $ | (698,475 | ) |