upc int or varchar, dbms dependent
cost dbms currency
margin dbms currency
case_cost dbms currency
Don't add to it.
As of 20Oct2012 it is still used by item/productList.php.
Deprecated. This mess dates back to trying to stay
lock-step with the Wedge's products table (which didn't
work anyway). The thinking was "Need a new field? Toss it
in prodExtra". Multiple, purpose-specific tables that
can be joined against products on upc would be a much