Minden Corporation estimates that the following costs and activity would be associated with the manufacture and sale of product A: Number of units sold annually 32,000 Required investment $ 520,000 Unit product cost $ 31 Selling and administrative expenses $ 170,000 If the company uses the absorption costing approach to cost-plus pricing described in the text and desires a 15% rate of return on investment (ROI), the required markup on absorption cost for Product A would be closest to: