Why do Maya and Dolores argue in I Know Why the Caged Bird Sings?

Maya and Dolores argue in "I Know Why the Caged Bird Sings" because Dolores refuses to let Maya watch her movie for free, which leads to a confrontation about race and fairness. Maya feels hurt that Dolores would charge her, while Dolores feels she is owed respect and payment for her services. The argument highlights the complexities of race, class, and friendship during their time.