Excel MS2010: SUM Formula Involving Multiple Columns & Drop Down List

[OmniBartonCreek]

[TABLE="width: 100%"]
<tbody>[TR]
[TD]I'm looking to sum totals in a drop down list as follows:In column C (lines 7 - 38) I have a drop down list that assigns categories to that particular line. In column F (lines 7 - 38) there are totals that apply to that particular line item that are numbers. These totals change with each instance of a particular category. Essentially what I've done is assign a number of attendees to a certain category of event.

EXAMPLE
Instance 1-----
Column C (Drop Down Selection): Event Type 1
Column F; Line 7: 42
Instance 2----
Column C (Drop Down Selection): Event Type 1
Column F, Line 8: 66

** What I need is a formula that will sum the total in all of Column F of all instances of Event Type 1 when selected as the drop down item in Column C
There would be about 6 or 7 incidences per spreadsheet and I need a sum of the total numbers associated with each category. In the above example I would need a formula that added the totals in F7 and F8 when associated with the "Event Type 1" category only. I need this to apply to all of column F. The destination box for the sum would be F44.
I know this is a SUM or SUMIF function but I'm not sure how to input it into the formula bar. Can anyone help?

Again...here's the information:

Category Assignment - Column C (Lines C7 - C38)
Numerical Value per Incidence - Column F (Lines F7 - F38)
Sum Total of Numerical Values per Incidence (Box F44)

THANKS![/TD]
[/TR]
</tbody>[/TABLE]