Totals on folios

There is no actual total on the folio. I have customers complaining that they have to either refer back to the invoice detail (for city ledger accounts) or sit and add the summary section to get the total. When they have 30+ folios from us, that is not practical. Also, some smart scan their invoices in and their systems can't find a total, so they pay the wrong amount and I have to process partial payments and reach out. Otherwise, they have to manually enter totals. It just makes sense to have a total on an invoice to make it easy for everyone to reference.