Sierra Company produces its product at a total cost of $160 per unit. Of this amount, $50 per unit is selling and administrative costs. The total variable cost is $128 per unit, and the desired profit is $24.00 per unit. Determine the markup percentage using the (a) total cost, (b) product cost, and (c) variable cost methods. Round your answers to one decimal place. a. Total cost % b. Product cost % c. Variable cost %