How to get an expression as an Image in a Full Accumulation Calculation

[marcel_olmo]

Hi guys! Happy new year!!

I've a dummy challenging thing about how to calculate full accumulation an show it as an image.

I've a chart with assets of 2010 year and 2009. And I'm doing a typical comparison between years.

The dif Number is a "full accumulation" calculation : column(1) - column(2).

And I'm trying to do the same as an Image. If select the "No accumulation" check, there's no problem, but otherwise, if I check the "Full Accumulation", there's a 0 as a result.

What I'm doing wrong?

THis is what I'm referring with "No Accumulation " and "Full Accumulation" :

And this is my result with the calculation as an Image (first table is with "No Accumulation" and second table is with "Full Accumulation") :

Many thanks in advance!!!

Regards