cement blocks???’s

OK< so, I am rebuilding a retaining wall, that caved in on me
and need to get some 8 "x 8 x"16 " cement blocks
does anyone know how many blocks on average come on each row of a pallet?
I’m too lazy to try and figure it out right now, SO? anyone work with block often enough to know??
I can only fit so many in my truck due to my cap, so trying to figure out how many I can get in it at a time?
Thanks