How can I group the amounts into a single line? When I group it by group_no, 
it looks like:
Group      Amount        Amount1         Amount 2
1                    20                  30                   15
1                    10                  15                   20
2                     5                   10                   15
2                    15                   5                    25
I want it to look like below: 
Group      Amount        Amount1         Amount 2
1                    30                  45                   35
2                    20                  15                   40
			
			
			
				Group by your preference utilizing a Header and / or Footer.
Use an Aggregate Total in the Header and / or Footer.
HTH, Bob
			
			
			
				All you have to do is set the detail aggregate property for all of your Amount/Measure Data Items to Total.
Then, by default, Cognos will automatically aggregate to the lowest level of granularity in the list.
Hope this helps,
Adam.