Varinble Cost Method of Product Pricing Smart Stream inc, uses the variable cost method of applying the cost-plus approsch to product pricing, The costs of producing and seling 10,000 cell phones are as follows: Smart Stream desires a profit equal to a 30% reture en 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 cell phones. b. Detemine the variable cost markup percentege for cell phenes. Mound to two decimal places. \% c. Deterivine the seling price of cell phones. If required, round to the nearest dollar. 1 per cell phone