for (i = 0, length = columns.length; i < length; ++i) {
comp = Ext.getCmp(columns[i].id);
fieldData = me.getSummary(store, comp.summaryType, comp.dataIndex, true);
for (i = 0, length = columns.length; i < length; ++i) {
comp = Ext.getCmp(columns[i].id);
fieldData = me.getSummary(store, comp.summaryType, comp.dataIndex, true);