Difference previous month in a textbox

[#1]

Hi,

i am new to qlikview and i try to create 3 textboxes on my Dashboard:

1) Total Amount of the selected period,  regarding other selections I took

2) Total Amount of the previous period

3) Differece beetween those textboxes

My first box is : sum(amount)

How can I create the TextBox 2 and 3?

[MarcoWedel]

Hi,

mabe like this:

hope this helps

regards

Marco