It was unclear how much money Wal-Mart would receive as a result of the changes. For instance, Wal-Mart is seeking to charge a food supplier 10 percent of the value of inventory shipped to new stores and to new warehouses, both one-time charges, and 1 percent to hold inventory in existing warehouses, according to a copy of amended terms seen by Reuters. The move marks a shift of sorts by Wal-Mart, which unlike other retailers has sought to limit such fees in return for demanding suppliers give it the lowest price, said Kurt Jetta, head of consumer and retail analytics firm Tabs Group Inc.