The following data are from the accounting records of Niles Castings for year 2. 89,888 Units produced and sold Total revenues and costs Sales revenue Direct materials costs Direct labor costs Variable manufacturing overhead Fixed manufacturing overhead Variable marketing and administrative costs Fixed marketing and administrative costs $280,000 66,eee 35,000 12,080 41,000 16,500 33,888 Required: a. Prepare a gross margin income statement. b. Prepare a contribution margin Income statement. Answer is not complete. 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 Sales revenue Fixed manufacturing overhead costs Variable manufacturing costs Gross margin Variable marketing and administrative costs Fixed marketing and administrative costs Operating profit IS 280,000 41.000 12,000 s 227,000 16,500 33.000