In October, as global financial markets plunged amid multiple bank bailouts, U.S. consumers showed marked caution at the cash register, focusing their purchases at food, drug, and mass merchandiser stores on basic necessities: food, medicines, and other household items.
Edible essentials, like bread, milk, cheese, and fresh produce, were among the top retail categories for October, according to Nielsen. 
Discretionary items like carbonated beverages, candy, and snacks were also among the top sellers in October — but most of these categories showed year-over-year unit and dollar sales declines.
Top Categories: October 2008 (Dollar Sales: Food/Drug/Mass Merchandiser Sales)

Rank
(by 2008 Dollar Sales)
Top Food/Drug/Mass Merchandiser Sales Categories
(October 2008)
Dollar Sales:
4 …