Moving Columns Headers to Rows

A_a_a Well, perhaps you could move the calculations to PQ and then unpivot. Otherwise, you could potentially use this: DAX Unpivot - Microsoft Power BI Community. Last thought, create a disconnected table that just lists your times like:

Time

0:00

1:00

2:00

Use this for your rows. Create a measure like this:

Measure =
  VAR __Time = MAX('DisconnectedTable'[Time])
  VAR __Result = 
    SWITCH(__Time,
      "0:00", SUM('Table'[0:00]),
      "1:00", SUM('Table'[1:00]),
      "2:00", SUM('Table'[2:00]),
      ...
    )