Precisions : For my grasping of VBA, I would like to see both versions
Version1 : This cycle would have Period1 and Period2, in the Summary
Table.
each following cycle would add one Period, to a
maximum of 12 Periods.

Version2 : A predefined Summary Table of 12 Periods.

Headers on 2 rows. Data starting in row 3 for all tables.
Thank you again,
Celeste