Daily Sum

Hii AllanBerces 
if you need it your way this can be done

Total Plan/day =
VAR TotalPerDay =
CALCULATE(
SUM('YourTable'[Plan Hrs]),
ALLEXCEPT('YourTable', 'YourTable'[PlanDate])
)

VAR FirstOccurrenceCheck =
RANKX(
FILTER('YourTable', 'YourTable'[PlanDate] = EARLIER('YourTable'[PlanDate])),
'YourTable'[Plan Hrs],
,
ASC,
DENSE
)

RETURN
IF(FirstOccurrenceCheck = 1, TotalPerDay, BLANK())



But the main thing to do it to create measure as it is more appropriate 
Total Plan/day =
CALCULATE(
SUM('YourTable'[Plan Hrs]),
ALLEXCEPT('YourTable', 'YourTable'[PlanDate])
)
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I'd appreciate the kuddos as well