AUSTIN (AP)When the clocks struck 12:01 a.m. today, Texas shoppers were given a three-day holiday from local and state sales tax.Throughout the weekend, Aug. 2-4, no sales tax will be charged on most clothing and footwear priced under $100.Stores and area business have spent the past few weeks preparing for the crowds they are expecting to take advantage of the break before the school year starts. Extra employees have been hired, and special promotions have been made to spur business and revenues.State Comptroller Carole Rylander said in a press release that an estimated $42 million will be kept in consumers