What important information does scout hear at the church service with calpurnia? How does she react?

At the church, a black woman named Lula tries to tell Calpurnia that white children don't belong at the church. However, Calpurnia points out that it's the same God, and the rest of the congregation welcomes the newcomers. Scout is surprised to hear Calpurnia speak in the same black dialect as the others, because at home, Calpurnia always speaks proper English. Inside the church, everything is much simpler than in the church she is used to, and there are no hymnbooks. Reverend Sykes announces that the collection taken up today will go to Helen, the wife of Tom Robinson. Calpurnia's son Zeebo, the town's trash collector, leads the congregation in hymns, singing each line and having the group repeat it back to him. Reverend Sykes gives a sermon, which seems similar to the sermons Scout is used to, except that he makes examples of particular people in the congregation to illustrate his points. After collection time, the Reverend counts the money collected and announces that they must raise ten dollars to give to Helen Robinson. He orders for the doors to be closed until everyone gives more. Scout and Jem are inspired by the sincerity, warmth, and hope of these people.