Hi Marcus,
Apologies if it is a bit confusing, and no question is a stupid one. Figure it is best to have a complete understanding.
Yes, you are correct in your assumptions below. If you grow your average from $1000 to $1350, that would put you in the “130-139% Growth” category, and would mean that you will receive a bonus of 80% of your average (which would be $800).
I hope this answers all your questions. Please let me know if there is anything else I can help with.