bigredhockey55

All your answers were great, thanks.
Basically for #3, the best explanation is that A and B were done and she ALSO needs to do 3 because she has thus far omitted it (even though I don’t see how obligation to generate a specific amount of brokerage falls into the 4 categories JP outlined above).
And for #6, commingling trades and averaging brokerage costs means you lose the ability to reward only those specific clients with the rewards of the brokerage that belongs to them.
Deciding not to bother with #15.