AUSTIN—Texas Comptroller Glenn Hegar is reminding shoppers they can save money on clothes and school supplies during the state’s sales tax holiday on Friday, Saturday and Sunday, Aug. 6-8. State law exempts sales tax on qualified items—such as clothing, footwear, school supplies, and backpacks—priced below $100, saving shoppers about $8 on every $100 they spend. The date of the sales tax holiday…