Two calculations one previous month

[#1]

Hi all.

My question is maybe that difficult but I doesn't find any good solution.

I have a calculation like this:

sum(aggr((sum({<Salary_Type_ID={'020'}>} Num_Hours_Def))

*(Max({$<KPI_Heading={"Contracted Hours Per FTE"}, KPI_RowDesc={"Draketimmar"}>} KPI_Value)))

/

if(Staff_Category_ID='Staff', (Max({$<KPI_Heading={"Contracted Hours Per FTE"}, KPI_RowDesc={"SPX"}>} KPI_Value)),

(Max({$<KPI_Heading={"Contracted Hours Per FTE"}, KPI_RowDesc={"Draketimmar"}>} KPI_Value)))))),Business_Group_ID ,Business_Unit_ID, Staff_Category_ID, Agreement_ID, Booking_month))

On the second calculation (the if statement) I would like to compare with the previous month.

Thanks in advance

[#2]

I will try to make it more clear.

First expression:      jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec

Second expression: feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec, jan 

Any one that have a godd solution for this?

[mangalsk]

hello,

Please attach sample qvw

[#4]

See attached qvw.