South Africa's Woolworths posts 31 pct jump in first-half profit

South African retailer Woolworths Holdings Ltd posted a 30.6 percent jump in first-half profit on Thursday, but warned that weak growth in Africa's most advanced economy could pose problems for the rest of the year. South Africa's retailers are battling to boost sales as consumers check spending amid rising interest rates and high unemployment, but Woolworths have done better than rivals, due to the appeal of its upmarket food and clothing to high-income customers. Earnings per share were impact