Range/Formula/Style/Format in Excel cell through Code using OfficeOpenXML Dynamics 365 finance and operation

//Dynamics 365 for finance and operation

//Setting Up range for collection of cells to do style/format

            OfficeOpenXml.ExcelRange cellRange;

            cellRange = Worksheet.get_Cells().get_Item("A4:D5");

            Style.ExcelFont lisStyle = cell.Style.Font;

            lisStyle.Bold = true;

            lisStyle.Size = 12;

            lisStyle.UnderLineType = true;

//Setting Up formula in excel cell

           OfficeOpenXml.ExcelRange  cellRange;

           cellRange =  Worksheet.get_Cells().get_Item(currentRow, 4);

           cellRange.formula = "=SUM(D2:D10)";

//Setting Up format in excel cell

var column = cell.get_Worksheet().Column(cell.get_Start().get_Column());

var columnStyle = column.get_Style();

var columnNumberFormat = columnStyle.get_Numberformat();

columnNumberFormat.set_Format(DateFormatString);

columnStyle.set_HorizontalAlignment(ExcelHorizontalAlignment::Right);