Basically, I want to select a date range of records and apply the SUMIF
formula to the selected records.

What should that formula look like? For example, for pants sold before
10/22/2009 and after 10/2/2009?
A B C
1 Date Description Amount
2 10/1/2009 pants 100
3 10/15/2009pants 100
4 10/16/2009pants 200
5 10/22/2009pants 300
6 10/23/2009pants 400
7 9/22/2009 pants 500
8 11/2/2009 pants 600
9 9/3/2009 pants 700