... costs: Rework Scrap Total internal failure costs External failure costs: Warranty repairs Customer returns Total external failure costs Total quality cost $ 590 12.3 100.0 Total ... frequently before they are shipped to customers o Prevention costs have increased from 1.7% of total production cost to 3.1% and from 10.4% of total quality costs to 25.4% The $80,000 increase is ... o...