Smart stream inc. uses the product cost method of applying the cost-plus approach to product pricing. the costs of producing and selling 10,000 cell phones are as follows: variable costs per unit: fixed costs: direct materials $150 factory overhead $350,000 direct labor 25 selling and administrative expenses 140,000 factory overhead 40 selling and administrative expenses 25 total variable cost per unit $240 smart stream desires a profit equal to a 30% return on invested assets of $1,200,000. a. determine the amount of desired profit from the production and sale of 10,000 cell phones. $ b. determine the product cost per unit for the production of 10,000 units of cell phones. $ per unit c. determine the product cost markup percentage for cell phones. % d. determine the selling price of cell phones. round to the nearest dollar. total cost $ per unit markup per unit selling price $ per unit