How to sum disinct value in groups

[Fattyjody]

Hi I am new in Qlik and get the table like this:

pkg	time	h_act	d_act
A	7	1	2
A	6	2	2
B	8	3	3
B	9	1	3
C	10	2	2
D	11	6	6

where pkg means app that users user, time means different times in day, h_act means how many users in one time, d_act means how many users in one day.

Is that possiable for me to gourp  the data by pkg and time and get sumed distinct value of d_act and as i choose different pkg, the value can change automatically?

Thanks!

[BrunPierre]

In terms of output, what do you expect? or perhaps as below.

Sum(Aggr(Sum(DISTINCT d_act), pkg, time))