Hello, Ab!
Group 1 must print for each minute since "Gas" and "Liq" (last 2 columns) are calculated based on partial values (each 30 minutes).
And Group 2 summarizes daily consumption.
So, we need Group 1 to calculate and Group 2 to summarize total.
It is common to hide Total, but what we need is just to hide details, keeping them over there to calculate each 30' fraction of "Gas" and "Liq"