Why Period-over-Period don't show total numbers

[VicLJ]

Hi all,

I’m creating different Period-over-Period custom calculations and I was wondering why it doesn’t add and shows a total % of increase/decrease. Might it be because some values are null? If this is the case, any suggestions that could allow to show the % total of the specific period?

See an image below:

At the bottom I’ve highlighted the missing total that I would like to have, in order to have an overall idea if we are growing or not