RFID Tags

i need to solve, the counting of how many sugar sack go to every truck, there is so many exits, every sacks it has to has Rfid tag, when go to the truck we make the counting, and then make the bill, we produce about 750000 sacks every month, we need to be shipper prices you have because the Rfid tag its go to be used one time only, because doesnot return to us, the tag has to be easy to add to the sack, maybe with a machine., please support me in this, i need more ideas how can i do this, the goal is has a accurate counting system, because we work 24 hours, and there is so many mistakes in manually counting.