The following data are from the accounting records of Niles Castings for year 2 Units produced and sold Total revenues and costs Sales revenue 89,000 $280,000 Direct materials costs 64,000 Direct labor costs 40,000 Variable manufacturing overhead Fixed manufacturing overhead 18,000 43,000 Variable marketing and administrative costs Fixed marketing and administrative costs 11,500 32,000 Required: 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 Prepare a gross margin income statement.