Dax command for does not start with

[JillianP333]

Hello- I'm trying to write a measure where I filter first by timesheet tasks, which is working, but then I also want to filter out the client numbers that start with a z.  Any help appreciated.

[Anonymous]

[Hours ...] =
CALCULATE(
	[Hours Worked], -- this should be your base measure
	KEEPFILTERS(
		'dw Timesheets'[Taks] in {...},
	),
	KEEPFILTERS(
		-- Are you sure it's called ClientNumber?
		LEFT('dw Clients'[ClientNumber], 1) <> "z" 
	)
)