Right click SUM(SResult) and click "Totals Using -> Average". Hope it helps.
The "Totals Using -> Average" on SResult will compute the averages in SQuestion columns.
What I want to achieve is average of SurveyTot, AdjustedTot, and AdjustedScore (which now displays blank in the Grand Total row).
If I do the same right-click on AdjustedScore, the option to Totals Using are not available.
Sorry about that Oscar, I misread your question...
hmmm... sometimes totals work better is you can make use of measure names / values, but I still think this might be difficult.