TransAlta (NYSE:TAC) reported quarterly earnings of $0.04 per share which beat the analyst consensus estimate of $0.01 by 300 percent. This is a 42.86 percent decrease over earnings of $0.07 per share from the same period last year. The company reported $412.000 million in sales this quarter. This is a 21.98 percent decrease over sales of $528.037 million the same period last year.