Footwear firm Rocky Shoes & Boots Inc on Thursday reported a big jump in second quarter net income to $1.1 million, or 25 cents a share, from $100,000, or three cents, in the year-ago period on the back of higher sales. The Ohio-based firm said sales in the 13 weeks to June climbed 13.9 per cent to $21.9m from $19.2m in the same period of 2002 as it was boosted by a 22 per cent jump in sales of its Rocky branded footwear.