Computing Markups The predicted annual costs for Mighty Motors are as follows: Manufacturing Costs Variable Fixed.. Selling and Administrative Costs Variable $250,000 Fixed. 550,000 $250,000 350,000 Average total assets for the year are predicted to be $7,500,000. Required a. If management desires a 10% rate of return on total assets, what are the markup percentages based on total variable costs and based on total manufacturing costs? b. If the company desires an 8% rate of return on total assets, what is the markup percentage on total manufacturing costs for (1) unassigned costs and (2) desired profit