The following data are from the accounting records of Niles Castings for year 2. Units produced and sold Total revenues and costs Sales revenue 86,000 $290,000 Direct materials costs 69,000 Direct labor costs 34,000 Variable manufacturing overhead 19,000 Fixed manufacturing overhead 48,000 Variable marketing and administrative costs Fixed marketing and administrative costs 14,000 33,000 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. Gross Margin Income Statement < Required A Required B >