The BV that you have to make in any 30 day period to get yourself qualifiied for the Member status.
 
                           Basic     Membership,            (149 BV)
                           Bronze  Membership,            (500 BV)
                           Gold      Membership,          (2000 BV)

can also be accumulated in the following manner:
The accumulated BV for all purchases of products that are made using the Member's personal user name will be valued with 100% towards the member’s qualification (upgrade) to Basic, Bronze or Gold.
The accumulated BV in any 30 day period flushes and the new 30 day period begins with ZERO BV in regard to qualification purposes.

The accumulated BV for all purchases made from all personally sponsored/referred Sitetalk users, UNAICO
Members will be valued with 25% towards the member’s/sponsor’s qualification (upgrade) to Basic, Bronze
or Gold. The accumulated BV in any 30 day period flushes and the new 30 day period begins with ZERO BV in
regard to qualification purposes.
Example:
YOU  (With your refferels A,B,C and D)
200 BV 
A                         B                           C                          D
200 BV                 600 BV                 500 BV                  2000 BV
25%=50 BV          25%=150 BV         25% =125 BV        25%=500 BV

Your total BV towards qualification = 200+50+150+125+500= 1025 BV
With this example the Bronze Member Status can be achieved.