NATIONAL PIZZA CO <PIZA> TO ACQUIRE RESTAURANTS National Pizza Co said it reached an agreement in principle to buy seven Straw Hat pizza restaurants and certain related real estate for approximately three mln dlrs in cash. The acquisitions will be converted to Pizza Hut restaurants, said National Pizza, and are expected to generate annual sales of approximately eight mln dlrs. When the sale is complete, it will bring to 24 the number of restaurants operated by National Pizza, the company said.