One of my users brought me an invoice that has an invoice total of 0.  However, the line item total on the invoice is 1441.  The customer is on the nontaxable schedule.  So, the Invoice subtotal would normally be 1441, Sales tax 0 and Invoice total 1441.  However, both the invoice subtotal and invoice total are zero.  Also, the payment method for this invoice was check.  Any idea as to why the invoice subtotal and total are zero?

Thank you,

Brian