Just doing a little simple math on the data, the total cost is for the 16 valid clicks you received. The tool tip for invalid clicks is not available right now, but the tool tip for invalid click rate says:
Invalid click rate
This column provides data on the percentage of clicks filtered out of your total number of clicks (filtered + non-filtered clicks) during the reporting period.
This all tells me the (7) invalid clicks are not part of the (16) Clicks reported.
Best of Luck!
The invalid clicks that you see reported in that "Invalid clicks" column are clicks that have been filtered out before they are charged to your account or added to your total number of clicks for a particular day or campaign. So you were right - the 16 clicks that you received do not include the 7 that were filtered out as invalid.
You can read more in our Help Center here: http://support.google.com/adwords/bin/answer.py?hl=en&answer=6427&topic=16336&ctx=topic&path=15950-1...
I hope this helps!