Gather values using a date range to sum up profits for a single month.

I have been trying to figure out how to work this with sumif, sumifs and Vlookup. I have either received errors or a $0.00 value. What I am trying to do is create a function that searches sales that are within the date range mm/dd/yyyy of a single month and sum up the total profits made for that month. Here is what my table looks like:

B.........................O......................Total profits
9/15/13................$265.13.................September
9/16/13................$265.13.................October
9/17/13................$265.13.................November

To sum up, I want to add all of the numbers in column o into my profits table when it is in the same month.