How does Amos feel when he does not get paid the full price for the leather?

Amos was angry and frustrated.

A fire was burning in him as he trudged home with the pittance in his pocket and no redress at hand. For when a white man chose to be overruling there was little the black man could say or do. But Amos would not go home while hate burned within him, so he sat on a boulder by the roadside and faced his mountain.