Watch out for this company! They do not bill cumulatively any longer and did not invoice our company at all in July after changing accounting procedures in June. We paid what we thought was the "in full" balance in August but we continued receiving invoices showing only late charges. Paid those charges for a few months before receiving a harassing call from someone. Yes, we received a credit back and paid the balance owing for the never received July invoice. Not billing cumulatively and only billing late charges is ludicrous.