Question on bar chart: expression formula

[danialier]

Hello,

I have an excel file with one column showing the average revenue per month as follows:

That means that in January the revenue was 1295.

In February the 2059 is the average revenue generated in January+February

In March the 2219 is the average revenue generated in January+February+March

In April the 2380 is the average revenue generated in January+February+March+April

.....

I want to create a bar chart showing the revenue per each month, not the average revenue accumulated. That would mean the following:

January = 1295

February = 2059 * 2 (months) - sum (revenue from January)

March = 2219 * 3 (months) - sum (revenue from January+February)

April = 2380 * 4 (months) - sum (revenue from January+February+March)

...

Following these formulas the revenue per month would be as follows, and this is the data I want to show in a bar graph:

And here the question: do you know what I should write in the expression formula to get these figures ?

Attached the xls file

Thanks,

dani

[tresesco · Accepted solution]

Check attached qvw.

[danialier]

Great Tresesco. This is just what I was looking for !!!