Product Cost Concept of Product Pricing Willis Products Inc. uses the product cost concept of applying the cost-plus approach to product pricing. The costs of producing and selling 200,000 units of medical tablets are as follows: Variable costs per unit: Fixed costs: Direct materials $ 75 Factory overhead $ 800,000 Direct labor 115 Selling and admin. exp. 1,200,000 Factory overhead 30 Selling and admin. exp. 20 Total $240 Willis Products desires a profit equal to a 20% rate of return on invested assets of $12,000,000. a. Determine the total manufacturing costs for the production and sale of 200,000 units