Total Castsconcept of Product Pricing Smart Stream Ine. uses the total cost concept of applying the cost-plus approach to product pricing. The costs of producing and seilling 10,000 cellular phones are as follows: 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 phanes. x2 c. Determine the selling price of cellular phones, Round to the nearest dollar: per phone