Current Month Sales based on Sales Manager DAX

[msarfaraz]

City	Country	Date	Sales Amount	Sales Manager
Dubai	UAE	01/01/2020	100	A
Karachi	Pakistan	01/01/2020	100	B
Jeddah	KSA	01/01/2020	100	C
Dubai	UAE	02/01/2020	100	A
Dubai	UAE	02/01/2020	100	A
Jeddah	KSA	02/04/2020	100	A
Karachi	Pakistan	02/05/2020	100	B
Jeddah	KSA	02/02/2020	100	C
Karachi	Pakistan	02/05/2020	100	A

 

[msarfaraz]

I have the table as above, and need to calculate Current month sales by sales manager DAX in power by, any help