AS the signs said outside each of the nine Yaohan stores yesterday: Cash Only, No Voucher Redemption and No Jade Stamp Redemption. Also banned were credit cards. Queues stretched behind every nearby automatic telling machine while shoppers loaded up on thousands of dollars in cash. The other catch: there were no warranties on many of the items. Other department stores stood empty as people passed them by. Shoppers armed with calculators, mobile phones and empty plastic bags cleared the shelves at Sha Tin. Calculators were shared between shoppers trying to stay within budget, while phones were brought out when lone buyers needed a second opinion on their purchase. A mother was yelling at her teenage son over the barrier at the Yaohan store in Tseung Kwan O to tell him what to buy after she was prevented from joining him. The first stop for many after leaving Yaohan was the lavatory - because while in the store, they were unable to leave without being forced to queue up again.