my source code

    protected void Button3_Click(object sender, EventArgs e)
    {

        UltraWebGrid1.Bands[0].Columns.Add("Total", "ba_ulimit * 5 = ?");
        Infragistics.WebUI.UltraWebGrid.UltraGridColumn c = UltraWebGrid1.Bands[0].Columns.FromKey("Total");
        c.DataType = "System.Double";
        c.Format = "C";
        c.Formula = " [ba_ulimit] * 5 ";
        c.Width = Unit.Pixel(150);
        c.CellStyle.HorizontalAlign = HorizontalAlign.Right;

        // set up footer summaries for total column
        c.Footer.Key = "Total";
        c.Footer.Caption = "Total = ";
        c.Footer.Total = Infragistics.WebUI.UltraWebGrid.SummaryInfo.Sum;
        c.Footer.Formula = "ROUND(SUM([Total]),2)";

        // set up footer summaries for the Unit Price column
        c = UltraWebGrid1.Bands[0].Columns.FromKey("ba_ulimit");
        c.Width = Unit.Pixel(150);
        //c.Header.Caption = "ba_ulimit Value";
        c.CellStyle.HorizontalAlign = HorizontalAlign.Right;
        c.AllowUpdate = Infragistics.WebUI.UltraWebGrid.AllowUpdate.Yes;
        //c.Format = "###,###,###.00";

        Infragistics.WebUI.UltraWebGrid.ColumnFooter cf = c.Footer;
        cf.Key = "ba_bcode";
        cf.Caption = "ba_bcode value = ";
        cf.Total = Infragistics.WebUI.UltraWebGrid.SummaryInfo.Avg;
        cf.Formula = "ROUND(SUM([ba_bcode]),2)";

        // Allow for footers to be visible
        Infragistics.WebUI.UltraWebGrid.UltraGridBand b = UltraWebGrid1.Bands[0];
        b.ColFootersVisible = Infragistics.WebUI.UltraWebGrid.ShowMarginInfo.Yes;

    }

what is  "#VALUE!" ?

i do .. File attachment  PNG pic.

i don't know. help me plz ^^