I have a file that contains the calculation of inventory using FIFO method, in the beginning to the end of the period, thus found the value end of the inventory.What I want is I want to know the position of each period, for example I want to know the position of the balance of supply each periods same as in my file (see Data base - Each of Period).
Is there someone who can help me, t give good formula for solve it, without manually like as my data "each of peiod" ? ..

Thanks.
Naris