Patton Company budgeted the following costs for the production of its one and only product, bells, for the next fiscal year: Direct materials $205,000 Direct labour 125,000 Factory overhead: Variable 70,000 Fixed 290,000 Selling and administrative: Variable 75,000 Fixed 80,000 Total costs $845,000 Patton has a target profit of $750,000. 

What is the target profit percentage as a percentage of total manufacturing costs?