Caltex Australia Limited said first half profits were up sharply to A$340.6 million from A$76.2 million in the same period last year. (US$1=A$1.4). It said the replacement cost of sales operating profit (RCOP) after tax came to A$180.3 million excluding significant items from A$86.1 million last year. Caltex said: “This result excludes the impact of…