Gracius Manufacturing is approached by a European customer to fulfill a oneminustimeminusonly special order for a product similar to one offered to domestic customers. Gracius Manufacturing has a policy of adding a 20​% markup to full costs and currently has excess capacity. The following per unit data apply for sales to regular​ customers: Variable​ costs: Direct materials $ 70 Direct labor 10 Manufacturing overhead 20 Marketing costs 40 Fixed​ costs: Manufacturing overhead 120 Marketing costs 40 Total costs 300 Markup ​(20​% of total​ costs) 60 Estimated selling price $ 360 What is the full cost of the product per unit for Gracius​ Manufacturing? A. $ 300 B. $ 140 C. $ 80 D. $ 360