The following table provides additional details underlying our guidance: Range of key power price assumptions : Other assumptions relevant to 2019 outlook: (1) These items are not defined under IFRS. Presenting these items provides management and investors with the ability to evaluate earnings trends more readily in comparison with prior periods results. Refer to the Free Cash Flow, Discussion of Segmented Comparable Results, and Earnings and Other Measures on a Comparable Basis sections of TransAlta's 2018 third quarter management discussion and analysis for additional information. About TransAlta Corporation TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the United States and Australia with a focus on long-term shareholder value. We provide municipalities, medium and large industries, businesses and utility customers clean, affordable, energy efficient, and reliable power.