Now that also bothered me a bit because I think that why to waste RPs to an APC when 4 Hispanos should be able to knock it out to say nothing on possible occupants, so I looked in my copy of Gooderson's book, not found that info but noticed that on the page 114 there was a table that shows around Mortain area of the 23 examined APCs 7 was destroyed by rockets, 4 by Cannon/MG fire, 1 was abandoned intact, 3 were destr by US Army and 8 were lost to unknown reason. None was destr by Germans. So almost half of the ACs were destr by air attacks, a bit highher number than I expected but not much because open topped lightly armoured vehicles were vulnerable to air attacks. I was more surprised that RPs had destr more APCs than a/c cannon/mg fire.
Also noted that earlier a team had found abandoned Panthers with full fuel tanks and ammo, so as I wrote earlier, not all abandoned AFVs were abandoned because of lack of fuel and more important is to notice that German forces outside the pockets usually had fuel to manoeuvre, so the lack of fuel inside a pocket was usually caused by the tactical situation as is usual sooner or later among surroudered forces.
Juha