So there are two first Batches?. Thats how i saw it and assumed it was an increment. Remember in incremental tables the second batch is always represented as 1 unit. But I see your point
Hi Oden, I see where your coming from. The way i saw it, there was an incrememtal increase between the first and second batch. I know in the table the second batch there was a 1 in the number of units produced. As it is an incremental increase, this represents the second batch!. from that point it accumilates. Hence the workings: