RadioShack said its fourth quarter net income of $127 million was up 17 percent over the same period a year ago. Comparable-store sales were flat compared to the prior year. Total sales in the fourth quarter 2003 were flat at $1.49 billion. For the year, net income was up about 13% to $298 million. RadioShack’s sales for 2003 were up 2% to $4.65 billion.