Response Time (exclude lunch-break, weekends, holidays) - dax

Question

I have two date fields with times. I want to calculate the response time of mins between Start and Finish excluding lunch breaks, weekends, and holidays.
I found the formula to exclude weekends, and holidays but how to exclude lunch also
Working hour start 9:00
End: 17:30
Response time (SLA) =
VAR _M =
CALCULATE (
COUNTROWS ( 'Date' ),
DATESBETWEEN ( 'Date'[Date], 'Table'[StartDate] + 1, 'Table'[ClosedDate] - 1 ),
'Date'[Weekday1] <> 6
&& 'Date'[Weekday1] <> 7,
ALL ( 'Table' )
) * 7.5 * 60
VAR _S =
IF (
WEEKDAY ( 'Table'[StartDate], 2 ) IN { 6, 7 },
0,
IF (
HOUR ( 'Table'[StartDate] ) < 9,
7.5 * 60,
DATEDIFF (
'Table'[StartDate],
DATE ( YEAR ( 'Table'[StartDate] ), MONTH ( 'Table'[StartDate] ), DAY ( 'Table'[StartDate] ) )
+ TIME ( 17, 00, 00 ),
MINUTE
)
)
)
VAR _C =
IF (
WEEKDAY ( 'Table'[ClosedDate], 2 ) IN { 6, 7 },
0,
IF (
HOUR ( 'Table'[ClosedDate] ) >= 17,
7.5,
DATEDIFF (
DATE ( YEAR ( 'Table'[ClosedDate] ), MONTH ( 'Table'[ClosedDate] ), DAY ( 'Table'[ClosedDate] ) )
+ TIME ( 9, 00, 00 ),
'Table'[ClosedDate],
MINUTE
)
)
)
VAR _Minute =
IF (
ISBLANK ( 'Table'[ClosedDate] ),
BLANK (),
_M
+ IF (
EDATE ( 'Table'[StartDate], 0 ) = EDATE ( 'Table'[ClosedDate], 0 )
&& NOT ( WEEKDAY ( 'Table'[StartDate], 2 ) IN { 6, 7 } ),
DATEDIFF ( 'Table'[StartDate], 'Table'[ClosedDate], MINUTE ),
_S + _C
)
)
RETURN
IF ( _Minute = BLANK (), BLANK (), _Minute )
Lunch Hour 13:00 to 14:00
25-10-22 10:02 31-10-22 16:58
31-10-22 14:40 31-10-22 16:48
31-10-22 12:17 31-10-22 16:50
31-10-22 15:03 31-10-22 17:00
31-10-22 15:45 31-10-22 16:44
31-10-22 14:19 31-10-22 16:44