Dear community members,
Your helping hand 
will be much appriciated as I don’t see a solution to get my calculations done while respecting some conditions. (more details are written in the doc itself)
Thanks on forehand for your eye opener 
, and I will owe you some 
Kind regards
//JP
Take a look at the changes I made to the doc - I have it working if you select a consecutive months. I am sure we can rig it up to work for non consecutive too but I hope this gets you going.
I have used named formulas here to break it down and show my work ( like a math class 
)
Dear @mallika,
Thank you soooooo much 
, yes you are right, my math is at a very poor level.
Something I need to develop 
Best regards,
//JP
