@Vishwanth_Raya Have you tried this and Checked if it works :
Invoice.AsEnumerable.Sum(Function(x) Convert.ToDouble(x(“Invoice Amount”).ToString.Replace(“$”,“”).Trim)).ToString
@Vishwanth_Raya You can try using the Replace again in this way :
Invoice.AsEnumerable.Sum(Function(x) Convert.ToDouble(x(“Invoice Amount”).ToString.Replace(“$”,“”).Replace(“,”,“”).Trim)).ToString