Youth-oriented apparel retailer Abercrombie & Fitch Co on Thursday posted a three per cent slip in August same-store sales but said net sales soared 20 per cent to $185.2 million from $154.9m in 2001. The Ohio-based operator of 543 outlets said in the first seven months of the fiscal year same-store sales fell five per cent but total sales for the period were up 18 per cent to $827.1m from $698.7m last year.