Crystal Reports Summary??

[C# Programming]

In crystal reports, how the hell am I supposed to add a simple summary field calculating sum or average when all I can see is Minimum, Maximum, Count and other dull functions, the funny thing is that I was able to see them and choose them from the menu some days beforehttp://www.barakasoft.com/script/Forums/Images/smiley_confused.gif

Please help

All generalizations are wrong, including this one!
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