Perwin Corporation estimates that an investment of $540,000 would be needed to produce and sell 32,000 units of Product B each year. At this level of activity, the unit product cost would be $30. Selling and administrative expenses would total $463,800 each year. The company uses the absorption costing approach to cost-plus pricing described in the text. If a 15% rate of return on investment is desired, then the required markup for Product B would be closest to: (Do not round intermediate calculations.)