Auto vs. Sum (Table vs. KPI)

[Oiesof]

Hello!

I have a table that shows hours saved per group per process. While I am using Totals function as 'Auto' it's generating wrong totals, but selecting Totals Function as 'Sum' giving the right results.  I want to show the total/sum in a seperate KPI. However, when I write the formula it shows the total wrong (it shows the same number as when I choose 'Auto' in the table). How can I change my formula to show the same number as when I choose 'Sum' in the table? As far as I can see I cannot choose between Auto and Sum for the KPI. 

Additional info is that the 'Completed Cases' is a variable. It consist of incoming cases minus exception cases.

The formula I use for calculating total hours 

=sum(aggr($(vCompletedCases),Process,Group))*sum(aggr([Minutes per case per process], Process,Group))/60

Group	Process	Minutes per case per process	Completed cases per group per process	Total hours per group per process
Total			51	14,49 (what I want)
A	1	10	4	(10*4)/60 = 0,67
B	1	10	5	0,83
C	1	10	6	1
A	2	20	10	3,33
B	2	20	12	4
C	2	20	14	4,66

Hope you can help me! In advance, thank you.