Help needed: Carry over balance from previous month

Hi aibrahim ,

Please create a Calendar table and these measures.

Credit / Bonus = 
CALCULATE (
    SUM ( 'Log of Hours'[Time (Hours)] ),
    'Log of Hours'[Task] = "Credit"
)

Starting balance = 
VAR PreMonth =
    CALCULATE (
        SUM ( 'monthly budget'[Allowance of Hours] )
            - SUM ( 'Log of Hours'[Time (Hours)] ) + [Credit / Bonus],
        PREVIOUSMONTH ( 'Calendar'[Date] )
    )
RETURN
    IF (
        PreMonth >= 0,
        SUM ( 'monthly budget'[Allowance of Hours] ) + PreMonth,
        SUM ( 'monthly budget'[Allowance of Hours] )
    )

Remaining Balance = [Starting balance] - SUM ( 'Log of Hours'[Time (Hours)] ) + [Credit / Bonus]

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.
Best Regards,
Winniz
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