Sum Field from all records from 01/xx/2009

[sicSRT8]

Not sure how I would go about this. I am trying to come up with a total sum for records during a specific month and year to be used with one of the chart plugins.

I guess there are several ways to do this but trying to figure out the most logical and fastest way to do this as a calc.

Trying to sum (JobTotals)from all records with 01/xx/2009 to one specific field.

However I am trying to get this data for each month then take this field and use in chart to show for each month. I will be using a year drop down to specify which year and month but have that part figured out.