Rolling 2 months

[#1]

Hello,

I need to calculate the amount for rolling two months from the month selected. Please look at the attachment of my approach and it would be great, if someone helps me to solve this issue.

Thanks

[#2]

can you check the below link

http://community.qlik.com/forums/p/16410/64106.aspx#64106

Thanks,

-Raghu