DevExpress Gridcontrol set up grouping

Some of the code is very useful, but I can't remember how to write it when I use it, so I'll make a draft here.

   Set group rollup private void Setsummation () {THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (devexpress.data.s            Ummaryitemtype.sum, "Tareweight", Coltareweight, "{0:n3}"); THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Grossweight", Colgrossweight, "{0:n3            }"); THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "miscdeduction", Colmiscdeduction, "{            0:N3} "); THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Refgrossweight", Colrefgrossweight,            "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Netweight", Colnetweight, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "H2O", Colh2o, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "H2O2", Colh2o2, "{0:n3}"); THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SuMmaryitemtype.sum, "h2oquantity", Colh2oquantity, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Dryweight", Coldryweight, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Cu", Colcu, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Cu2", ColCu2, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Au", Colau, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Au2", ColAu2, "{0:n3}"); THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "auquantity", Colauquantity, "{0:n3}"            );            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Ag", Colag, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Ag2", ColAg2, "{0:n3}"); This. GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "agquantity", Colagquantity, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Pb", COLPB, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Zn", Colzn, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Sb", Colsb, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Sb2", ColSb2, "{0:n3}");            THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Sb", Colsb, "{0:n3}");        THIS.GRIDVIEWSHIPMENT.GROUPSUMMARY.ADD (DevExpress.Data.SummaryItemType.Sum, "Sb2", ColSb2, "{0:n3}"); }

DevExpress Gridcontrol set up grouping