Very low price . Our commitment is too great. Every day we have to collect many orders via fax network. The quality of the products is not very good. In general, all three fields can sometimes be used. Some open a new one and cannot be printed. Sometimes prints all black. I emailed a complaint earlier and asked you to send it back, but I didn't get any response or help. Everything is OK. The reason I keep buying is because our consumption is too high. We need to save some money