Willis Products Inc. uses the total cost concept of applying the cost-plus approach to product pricing. The costs of producing and selling 7,000 units of medical tablets are as follows: Variable costs per unit: Fixed costs: $94 Factory overhead $224,000 Direct materials Selling and admin. exp. Direct labor 34 77,000 Factory overhead 29 23 Selling and admin. exp. $180 Total Willis Products desires a profit equal to a 25% rate of return on invested assets of $686,840. a. Determine the amount of desired profit from the production and sale of 7,000 units b. Determine the total costs for the production of 7,000 units. Variable Fixed Total Determine the cost amount per unit for the production and sale of 7,000 units per unit c. Determine the total cost markup percentage per unit. (rounded to one decimal place) % d. Determine the selling price per unit. Round to the nearest cent. per unit