The following data are from the accounting records of Niles Castings for year 2 Units produced and sold Total revenues and costs Sales revenue 87,000 Direct materials costs $250,000 63,000 Direct labor costs 38,000 Variable manufacturing overhead 20,000 Fixed manufacturing overhead 45,000 Variable marketing and administrative costs 12,500 33,000 Fixed marketing and administrative costs 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> 4