Have you looked into HOFxLap too? That will tell you the actual number all of the tyre sets used in the race.
I had never really read the above information about how tyre sets were designated. So effectively for the first two practice sessions it is only possible to use 3 sets of each dry compound, and after these sessions those 6 sets are discarded, leaving 7 of each remaining.
Ahh well, I usually just head straight into qualifying, one hotlap and then start the race from the front :D
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function. -- F.Scott Fitzgerald