Calculating R12 values

[#1]

Hi guys

I am trying to create a chart based on the table attached, where the "Weighted amount in SEK" should be calculated into R12 values.

And if I select to display 2010 to 2012, it should still calculate Feb 2009 to Jan 2010 to display in Jan 2010 as first value in the chart.

Anyone there who can help me?

I have tried searching around without any luck.

Best regards

Thor

[#2]

Fantastic.

Works like a charm.

Thanks for great help

Regards

Thor