Hi Simon
Yes, you can use Performance Analysis to do this. You will need to use an Aspect Analysis I believe and then generate a column pattern to give you your A*- C and A* - G etc, in fact any combination you require. This would be a cohort level.
If you want individual aggregations then you will need to use Assessment Manager. There are loads of excellent formulae that you can use.
Hope that helps a little. I realise it is not exactly 'idiot proof' instructions. Would need a bit more info on exactly how you want to handle the data.
Mags
