Wal-Mart Stores, Inc. reported net sales for the five- week period ending Dec. 29, 2000, of $25.700 billion, an increase of 6.5 percent over the $24.127 billion in the similar period in the prior year. Sales for the 48-week period were $178.826 billion, an increase of 15.8 percent over the $154.446 billion in the similar period in the prior year.