Sales by discount, mail-order and delivery retailers in South Korea are predicted to rise sharply relative to those of more traditional outlets this year, a report by the Korea Chamber of Commerce and Industry indicated. The report showed that mail-order and delivery sales are likely to rise 140 per cent on average, discount store sales will increase 31 per cent, convenience stores will see a jump of 25.5 per cent, department store sales will increase 12.9 per cent and supermarkets will get an eight per cent hike in sales this year. But sales at conventional markets will decrease five per cent, the report said.