The Sierra Company produces its product at a total cost of $1,100 per unit. Of this amount, $750 is product cost and $350 is selling and administrative expenses. In addition, the total cost of $1,100 is made up of $935 variable cost and $165 fixed cost. The desired profit is $187 per unit. Determine the mark up percentages under each of the following cost-plus methods. If required, round your answers to one decimal place (a) Total cost concept (b) Product cost concept (c) Variable cost concept