hi everyone, would it be possible to know the sum of these weight descents by calculation?

I tried several calculations but using either the tagval or the tagmax-tagmin I didn't get the result.

this weight increases from time to time (as shown in the photo) consequently the calculation is not successful, assuming wrong calculations.

I need a calculation that totals this weight, in this certain time.

the hourly flow I can calculate it, but the total no!

considering that the flow is not constant and therefore today can have a number, and tomorrow another, I need to totalize all these descents in weight.

I use pi processbook 2014

Could you please confirm if you are looking to add all the highlighted sections in the screen shot or different from the highlighted.