Q4 2014 Q3 2014 Q4 2013 Net sales 2,677 2,421 11% 2,674 0% Operating income 350 434 589 Net income 195 323 408 Shareholders' net income 195 318 409 Earnings per ADS 0.33 0.54 0.69 Earnings per share 0.17 0.27 0.35 EBITDA* 712 587 21% 745 EBITDA margin 26.6% 24.3% 27.8% *EBITDA is defined as operating income plus depreciation, amortization and impairment charges/ . Operating income in the fourth quarter of 2014 includes an impairment charge of $206 million on our welded pipe operations in Colombia and Canada and our net income includes an additional impairment charge of $49 million on our investment in Usiminas which is recorded in the equity in earnings of non-consolidated companies line.