Quality Control Activities	Activity Cost
Process audits	$49,700
Training of machine operators	27,700
Processing returned products	16,000
Scrap processing (disposal)	24,400
Rework	6,400
Preventative maintenance	27,100
Product design	43,500
Warranty work	7,000
Finished goods inspection	22,000

From the above schedule of activity costs, determine the external failure costs.