How Many Budgies In My Cage?

[Joshua 0]

Hi how many budgies can I fit in my new cage.

I am currently breeding two budgies but I just got in a new double cage, it has 4 doors for food/water, 2 doors for access to the budgies and a divider down the middle for separation (note I also have many spare toys). The dimensions of the whole cage are 85cm x 50 x 50, how many budgies can I put in there?

p.s. I also hand tame all my birds before breeding which means I can give them a couple hours outside the cage daily.

thanks for any advise you could leave me with.