LOWRANCE ELECTRONICS INC <LEIX> 2ND QTR JAN 31 Shr profit 17 cts vs loss two cts Net profit 520,000 vs loss 51,000 Sales 11.1 mln vs 6,897,000 1st half Shr profit 34 cts vs profit 12 cts Net profit 951,000 vs profit 320,000 Sales 20.6 mln vs 14.9 mln