Which means that they ignore transportation costs, inventory financing costs, advertising costs, sales costs, leasing costs and taxes among other things.
You are able to buy that toy truck because you heard about it, because it is available in your neighborhood and not China and because there is a heated, lighted, staffed store in which to buy it.
If the Greenies don't want people working at Wal-Mart, maybe they should consider building new factories to replace the steel mills that have laid off so many of the unemployed people of the Ohio Valley who now are lining up eagerly and willingly to apply for those Wal-Mart jobs. No, wait, we can't have factories or steel mills - too much air pollution. Never mind!