How can i group after summarize

Built 2 calculated columns and one measure in the data model given.

Columns on tabWorker:

Training Hours Per Worker = CALCULATE( SUM( tabData[Hours] ) )

TotalHrs Label = SWITCH(

    TRUE(),

    tabWorker[Training Hours Per Worker]<=20, "<=20",

    tabWorker[Training Hours Per Worker]<30, "<30",

    tabWorker[Training Hours Per Worker]>=30, ">=30"

)

Measure:

Worker Cnt = COUNTROWS( tabWorker )

give it a thumbs up and accept as solution if this helps!