Smart Stream desires a profit equal to a 30% rate of return on invested assets of $1,200,000. a. Determine the variable costs and the variable cost amount per unit for the production and sale of 10,000 cellular phones. b. Determine the variable cost markup percentage for cellular phones. Round to two decimal places. % c. Determine the selling price of cellular phones. If required round to the nearest doliar. per phone Fenoback v Check Mr Wore a Divide the ver able manufacturing costs by the number of unis b. Oivide the desired profit plis the lotal fixed cosis by the total variable costs. c. Add the cost (a) and markup [(a)(b)]