Australian retailer Coles Myer has reported first-half net profit of A$217.9m (US$130.8m), a rise of 2.5% after a one-off charge compared to the year-ago period. Coles Myer, Australia's biggest retailer with 1,800 stores throughout Australia and New Zealand, also backed its full-year net profit forecast of $425m to $435m, up 20-23% year-on-year.