Specialty retailer of women's apparel, Christopher & Banks Corp, on Wednesday posted a 49 per cent year-on-year leap in first quarter net profit to $9.8 million on the back of a 35 per cent jump in sales to $77.8m. The Minneapolis-based operator of nearly 400 stores said same-store sales in the 13 weeks to June 1 climbed 10 per cent and added it opened 45 new stores during the period. It expects June same-store sales to climb around 11 per cent.