Welcome new registering member. Your username must be your real First and Last name (for example: John Doe). "Screen names" and "handles" are not allowed and your registration will be deleted if you don't use your real name. Also, do not use all caps nor all lower case.
I answered this in the other forum you posted. Per a similar question I asked, it's specifically for 5 or 10. FYI, if you buy the 10 package split by 8 is approx $85 each. And you have two extra registrations to sell or donate.