Cullumber Corporation produces outdoor portable fireplace units. The following cost information per unit is available: direct materials $21, direct labour $13, variable manufacturing overhead $17, fixed manufacturing overhead $24, variable selling and administrative expenses $9, and fixed selling and administrative expenses $15. The company's ROI per unit is $18. (a) Calculate Cullumber Corporation's markup percentage using absorption-cost pricing. (Round answer to 2 decimal places, e.g. 15.25\%.) Markup percentage % eTextbook and Media