Pearl of wisdom ( truth )

　　Hit the book:

　　Private label

　　Oversize

　　Bulk

　　Warehouse club

　　Awkward

　　Practical purpose

　　Bargain

　　Bottom shelf

　　What's there: Store and private-label brands; oversize and bulk items.

　　Why: "Store brands go on shelves four and five because people who buy store brands will always hunt for them," says Childress. "Thesupermarkets carry bulk items to compete with warehouse clubs like Sam's and Costco," Liebmann explains, and bulk items are awkward to store anyplace but the bottom shelf.