Excerpt from article:

OSHTEMO TOWNSHIP -- The glass doors to the Wal-Mart Supercenter's sprawling food section slide open and Didier Leiton steps inside.

The Costa Rica native doesn't do his food shopping in places nearly so massive, yet in a way, he is intimately familiar with some of the produce before him at the Ninth Street store near Kalamazoo.

A pile of pineapples is stacked in front of him, for $2.98 each. He grabs one with his left hand and reads the label...