Casual clothing giant Fast Retailing Co Ltd and owner of the hit Uniqlo brand on Tuesday reported a 30.7 per cent year-on-year plunge in October same-store sales - its 13th consecutive monthly sales fall. The company said in a statement per-customer sales slipped 12.5 per cent and customer numbers dropped 20.8 per cent from a year earlier. It added the sales fall was within its expectations.