$sql = "UPDATE ".TB_PREF."stock_master SET overhead_cost=".db_escape($overhead_cost)."
WHERE stock_id=".db_escape($stock_id);
db_query($sql,"The cost details for the inventory item could not be updated");
$sql = "UPDATE ".TB_PREF."stock_master SET overhead_cost=".db_escape($overhead_cost)."
WHERE stock_id=".db_escape($stock_id);
db_query($sql,"The cost details for the inventory item could not be updated");