The question concerns about the novel titled "Mules and Men", an autoethnographical book written by Zora Neale Hurston. The book presents various folklore of African society, collected from Florida and New Orleans.
In the text, Zora takes on various role as a speaker reflecting her belief in presenting multiple viewpoints. In her collected folklores, she presents various viewpoints, therefore, by taking various roles in the passage she is reflecting her belief of multiple viewpoints.
As the narrator deducts money from yulias pay in the ninny the main way that he justifies to her that he is correct and she is not is be saying that she has done poor work.