Normal sperm count is:
20 million per ml
40 million per ejaculate
Both
None
Some important points regarding spermatogenesis

Sperms are produced in: seminiferous tubules in testes
Sertoli cells nurture the developing sperms
Time for spermatogenesis: 64 days (Thymidine labelling records say it is 74 days)
Normal sperm count: 20 million per ml or 40 million per ejaculate
Infertility is considered with a sperm count of less than 15 million sperms/ml
Fructose is the main source of energy for sperms
Prostaglandins suppress immune response against sperms in the female reproductive tract
Zinc serves to help to stabilize the DNA-containing chromatin in the sperm cells
Acrosomal cap houses the various enzymes needed to penetrate the zona pellucida of the oocyte.