I think in the starting paragraph you should take out where you say slavery wasn't that bad to some due to who they were owned by because just the lifestyle of being owned as a possession is degrading for a human being. Other than that great job and good vocabulary.
Answer:
The author's purpose is the primary reason the author wrote the text
i believe its $6.95 but i did that in my head so i might be wrong
The indirect object always comes between the verb and the direct object.
Buttermilk is the answer, I believe. <span />