Voice Com Inc. uses the product cost concept of applying the cost-plus approach to product pricing. The costs of producing and selling 4,670 cellular phones are as follows: Variable costs: Fixed costs: Direct materials $78 per unit Factory overhead $199,000 Direct labor 31 Selling and administrative expenses 69,300 Factory overhead 28 Selling and administrative expenses 20 Total $157 per unit Voice Com wants a profit equal to a 15% rate of return on invested assets of $600,500. a. Determine the amount of desired profit from the production and sale of 4,670 cellular phones. $fill in the blank 1 b. Determine the product cost and the cost amount per unit for the production of 4,670 cellular phones. If required, round your answer to nearest dollar. $fill in the blank 2 per unit c. Determine the product cost markup percentage (rounded to two decimal places) for cellular phones. fill in the blank 3 % d. Determine the selling price of cellular phones. Round to the nearest dollar. Cost $fill in the blank 4 per unit Markup fill in the blank 5 Selling price $fill in the blank 6 per unit