The following data are from the accounting records of Niles Castings for year 2. Units produced and sold Total revenues and costs 80,000 $270,000 Sales revenue Direct materials costa Direct labor costs Variable manufacturing overhead Fixed manufacturing overhead Variable marketing and administrative costs Fixed marketing and administrative costs Required: 61,000 39,000 18,000 49,000 15,500 30,000 a. Prepare a gross margin income statement. b. Prepare a contribution margin income statement. Complete this question by entering your answers in the tabs below. Required A Required B