Total Cost Concept of Product Pricing Smart Stream Inc, uses the total cost concept of applying the cost-plus approach to product pricing. The costs of producing and selling 10,000 cellular phones are as follows: Smart Stream desires a profit equal to a 30% rate of return on invested assets of $1,200,000. a. Determine the total costs and the total cost amount. per unit for the production and sale of 10,000 cellular phones. b. Determine the total cost markup percentage (rounded to two decimal places) for cellular phones. % c. Determine the selling price of cellular phones. Round to the nearest dollar: per phone a. Divide the variable and ficed manufacturing coats by the number of units. b. Oivide the desired profit by the totat cost c. Add the cost (a) and markup f(a)(0)