Casual clothing and sports apparel maker Quiksilver Inc on Wednesday posted a 412 per cent jump in fourth quarter net income to $12.1 million from $2.3m in the year-ago period on the back of soaring sales. The California-based firm said net sales for quarter to October 31 increased 14.6 per cent to around $195m from $170.1m in 2001, with full-year sales up 13.8 per cent to $700m and full-year net income up 34.2 per cent to $37.5m from $28m last year.