DAX filter not working

Hi Anonymous  Sorry for the delay in replying. Here is your solution.
The first thing you need to do is write a measure that will determine the Range

Rev Range = 
SWITCH(
    TRUE(),
    AND([Rev_Current YTD] >= 0, [Rev_Current YTD] <= 100), "$ 0 to 100",
    AND([Rev_Current YTD] >= 101, [Rev_Current YTD] <= 500), "$ 101 to 500",
    AND([Rev_Current YTD] >= 501, [Rev_Current YTD] <= 1000), "$ 501 to 1000",
    AND([Rev_Current YTD] >= 1001, [Rev_Current YTD] <= 1499), "$ 1001 to 1500",
    [Rev_Current YTD] > 1500, "> $1500" 
    )

The next step is to see to which CustID the Range is assigned and calculate the quantity as a measure

Amount raw = 
VAR _CustomerSegments =
ADDCOLUMNS(
	VALUES('Raw data'[CustID]),
	"Segment", [Rev Range]
	)
VAR _SegmentCustomerCount =
GROUPBY(
	_CustomerSegments,
	[Segment],
	"# Customers", COUNTX ( CURRENTGROUP (), 1 )
	)
VAR _Result = 
FILTER(
    _SegmentCustomerCount,
    [Segment] = SELECTEDVALUE('Range table'[No Rev])
)
RETURN
MAXX(
  _Result,
    [# Customers]
   )

We count the total number by No Rav

Amount raw total = 
IF(
    HASONEVALUE('Range table'[No Rev]),
    [Amount raw],
    SUMX(VALUES('Range table'[No Rev]),
    [Amount raw]) )

I am attaching the file