How does larcom's memoir us to understand some of the effects of the market revolution on the lives of ordinary americans?

By giving us an example of how people, including children, had to leave their homes and work in national markets that ripped families apart physically more than morally.
Larcom memoires was about the live of average americans during the early age of industrial revolutions. IT shown harsh reality where people lived on poverty within unsanitary environment that is created by the residual of manufcaturin process.

1190 is your answer! the way you get it is 1400 - 15% =1190 : )