I'm not sure I can adequately describe this with words.  We have made some enhancements to the Format button located in the tool strip just above the query list results.  We have always had columns for Contribution Total, Average, etc.  Now you can filter within those columns by date, committee, cycle, and event.

Click the image below for a larger view:

See the video below for HOW to accomplish this: Launch external browser and play video.