<value><string>python: field.get_orig_value(\'columns\') + (context.REQUEST.form.get("item_stock") == 1 and [(\'aggregate_title_list\', \'Aggregated Items\')] or [])</string></value>
<value><string>python: field.get_orig_value(\'columns\') + (context.REQUEST.form.get("item_stock") == 1 and [(\'aggregate_title_list\', \'Aggregated Items\')] or []) + (context.REQUEST.form.get("inventory_valuation_method") and [(\'total_price\', \'Inventory Value\')] or [])</string></value>