2. Using the cost equations, prepare a contribution margin income statement (in good form) for September when 5,700 units are expected to be sold. The Central Valley Company is a manufacturing firm that produces and sells a single product. The company's revenues and expenses for the last four months are given below. Required: 1. Management is concerned about the losses experienced during the spring and would like to know more about the cost behaviour. Develop a cost equation for each of the costs