public void CreateSalesReport()

// 7. Format currency column worksheet.Cells["C2:C3"].NumberFormat = "$#,##0.00"; worksheet.Cells["D2:D5"].NumberFormat = "$#,##0.00";

// 4. Add sample data (normally from DB) worksheet.Cells["A2"].Value = "Widget A"; worksheet.Cells["B2"].Value = 150; worksheet.Cells["C2"].Value = 12.99;

// 2. Define headers worksheet.Cells["A1"].Value = "Product"; worksheet.Cells["B1"].Value = "Units Sold"; worksheet.Cells["C1"].Value = "Unit Price"; worksheet.Cells["D1"].Value = "Total Revenue";