SYDNEY (AFX) – Woodside Petroleum Ltd said total sales of gas and liquids for the six months to June totalled A$963.5 million, down from A$1.159 billion in the previous corresponding period. (US$1=A$1.77). In a statement, Woodside said first half gas sales revenue fell 7.5% to A$303.3 m, while sales revenue from liquids fell 20.6% to…