I have a column of days, Monday through Sunday for the last three years. In the column next to it I have a 0 to exlcude that day and a 1 to include that day. I need to be able to count the numbers using the column with 0 or 1 given a certain date range. An example would be 7/15/2010 to 8/15/2010 would be 31 actual days, but would only 20 open business days. Need to count the open business days, there are more then just the 7/1/2010 to 8/15/2010 ranges.
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