Calculate subtotal using dax

[Credo]

I would like to calculate a subtotal using dax (not using the subtotal feature of matrix visual)

Sample data: 

Client	Shop	Sales
A	1	100
A	2	200
B	3	400
B	4	500

Desired outcome: 

I want a measure that can calculate Client total for the displayed Shop without adding the client field itself to the visual

Shop	Client Total
1	300
2	300
3	900
4	900

Best I could come up with was 

CALCULATE(SUM('Table1'[Sales]); ALL('Table1'[Shop]))

but it just gives me a repeating 1200 across all shops as it should unless I add client field to the table.

How can I add filter context for the client into the measure if its not part of a visual? 

[Anonymous]

Add as measure

TotVal = CALCULATE(SUM(Table1[Sales]),ALLEXCEPT(Table1,Table1[Client]))

[PattemManohar · Accepted solution]

@Credo Please try this as a "New Measure"

Test107 = CALCULATE(SUM(Test107Measure[Sales]),FILTER(ALL(Test107Measure),Test107Measure[Client]=SELECTEDVALUE(Test107Measure[Client]))) 

[Credo]

Thanks a lot