Retail giant Coles Myer Ltd on Wednesday forecast a 20 per cent climb in full-year net profit boosted by an 8.4 per cent increase in second half sales to A$13.27 billion (US$6.78bn). In a statement the retailer said total sales for the second quarter increased by 9.7 per cent to A$7.331bn and that general merchandise and apparel group sales jumped 4.9 per cent in the half to A$5.13bn and 6.9 per cent to A$3bn in the second quarter.