DAX calculate table values that is not blank

[witbi]

I have the following hierarchy table and am stuck to generate a sub table that can filter out the blank row.

Any assistance would be most appreciated!

Department	Manager	Staff
Human Resources
Human Resources	A
Human Resources	A	G
Human Resources	B
Human Resources	B	H
Human Resources	B	I
Engineering
Engineering	C
Engineering	C	J
Engineering	C	K
Engineering	C	L
Engineering	D
Engineering	D	M
Engineering	E
Engineering	E	N
Engineering	E	O
Accounting & Finance
Accounting & Finance	F
Accounting & Finance	F	P
Accounting & Finance	F	Q

[Jihwan_Kim · Accepted solution]