2 each
#21 (seals/wipers)
#9 (bushing)
#10 (bushing)
#9 #10 are the wearable bushings...some folks skip replacing those. I replace them, generally at 50,000 miles when my forks start leaking.
Occasionally, at least one #28 (if one needs replacing then might as well do both).
Better to have these and not need them then the other way around.