Water Industries' quality control report for August contains the following items. Gathering, analysis, and reporting quality data Inspecting raw materials received from vendors Testing and inspecting finished products Visiting customer sites to test product Designing product to reduce production problems Repairing and/or replacing products under warranty Maintaining the equipment used to gather quality data Cost (net) of materials wasted during production $ 1,900 2,900 3,900 4,900 5,900 6,900 7,900 8,900 What would be the total of the external failure costs on the August quality control report for Water Industries? 0 $4,900 O $6,900. $7,900 O $15,800