how to calculate markup percentage using total cost per unit?

Ahmed Corporation makes a mechanical stuffed alligator. The following information is available for Ahmed Corporation's expected annual volume of 500.000 units: Per Unit Total $14 19 12 Direct materials Direct labour Variable manufacturing overhead Fixed manufacturing overhead Variable selling and administrative expenses Fixed selling and administrative expenses $350,000 4 150,000 The company has a desired ROI of 20%. It has invested assets of $22.200,000