Где формируется переменная отвечающая за вывод общей суммы заказов minishop2?

getCenterFields: function () {
        return [{
            xtype: 'displayfield',
            id: 'minishop2-orders-info',
            html: String.format('\
                <table>\
                    <tr class="top">\
                        <td><span id="minishop2-orders-info-num">0</span>
{0}</td>\
                        <td><span id="minishop2-orders-info-sum">0</span>
{1}</td>\
                    </tr>\
                </table>',
                _('ms2_orders_form_selected_num'), _('ms2_orders_form_selected_sum'),
                _('ms2_orders_form_month_num'), _('ms2_orders_form_selected_sum')
            ),
        }];
    }