I assume there is 100,000 per batch. I look at the unit number and go back through my history. It seems the unit number goes 0 - 99,999 or 100,000 units. Whether they are all the same size, I don't know for certain. It is an assumption. Without any additional information, assumptions have to be made. Unit numbers bounce around and so do batch numbers. I mark them as I catch them. I have a rolling 30 days of history that I can go back and interrogate if I feel I might have missed something. Is it perfect? Absolutely not.

Correction on the calculation... about 175 batches remaining at 4 days per batch would be about 700 days give or take depending on participation. So, ignore my 40 day comment. Looks like at least 2 years

It will probably go back and forth. We have been returning more than 80,000 per day the last couple of days. That changes the equation if it keeps up. Once I'm done with MIP1, I'll be moving 100% to OET1. Started seeing batch 1148 for the first time this morning.